&EPA
United States
Environmental Protection
Agency
Office of Research and
Development
Washington, DC 20460
EPA600/R-95/116A
August 1995
Blind-A Performance
Evaluation Study
A Statistical Evaluation of
the April 18, 1995 Data
0593RSD95 COV-116A
-------
Blind-A
Performance Evaluation Study
April 18, 1995
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
CHARACTERIZATION RESEARCH DIVISION-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Radiation Sciences Branch (CRD-LV)
Performance Evaluation Study for Blind-A; April 18, 1995.
The known value for each analysis was determined by gravimetric methods,
checked by chemical analyses performed by CRD-LV's Radiochemistry Laboratory,
and compared to the participating laboratories' grand average.
The expected precision, determined by the known value, was taken from
"Table 3. Laboratory Precision: One Standard Deviation Values and Control Limits
for Various Analyses", which is based on data accumulated over the years by the
Performance Evaluation Program, and can be found in the Environmental Radioactivity
Performance Evaluation Studies Program and Radioactive Standards Distribution
Program information brochure.
Please take a few minutes to review this report and the analytical data your
laboratory submitted to us. If there are any apparent discrepancies, please notify us
immediately.
We encourage you to make use of the computer-automated data-entry system
that has been in place for some time now. As the number of participants increases,
and it becomes unrealistic for us to receive results by mail or FAX, the computer
system will be our only avenue for accepting data.
If you have any questions or comments, please send a message via the data-entry
system or contact George Dilbeck at 702/798-2104 or Patricia Honsa at 702/798-2141 .
Sincerely,
George Dilbeck
Chemist
Radioanalysis Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subject to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CKD-LV Performance Evaluation: Blind-A, 18-Apr-1995 1/30
The following pages consist of separate sections for each of the nuclides in this study with four
parts per section. After the first, each part is separated from the next by a new page or a thick
horizontal bar. The first page of each section is a statistical summary for the nuclide and starts
with a statement of the known value, the control limits, and the warning limits.
The warning limits are placed at two normalized standard deviations above and below the
known value and the control limits are three normalized standard deviations above and below
the known value. If you keep control charts, these values will be useful for anticipating problems
with the accuracy of your analytical methods.
The coin shaped pie chart at the top of the summary page shows the fate of all the samples
sent out in number and percentage terms. The pie chart starts at the top and rotates clockwise.
The first sector represents those participants who submitted analytical results within both the
warning and control limits. The next sector represents those who are in the warning region but
not out of control. The third sector represents those who are out of control, but have passed
the outlier test. The fourth sector represents those who have failed the outlier test. The last
sector represents those participants who have failed to respond properly. This is the case if no
analytical results were returned, or less than three determinations were reported, or if the results
were received too late. The reeding on the edge of the coin is spaced at one percent intervals, and
the sector shading becomes darker as the data reliability decreases. Sectors with zero width are
not shown.
The table in the center shows a number of statistical quantities calculated from the submitted
data based on the mean and median values in relation to the known value, both before and after
outlier removal. The lower pie chart uses the same construction as the upper chart and shows
the distribution of properly submitted data in terms of deviation from the known value divided
into sectors representing one, two, three, and greater than three normalized standard deviations.
The second part is an alphabetical listing, in lab-code order, of submitted data and several
calculated quantities. An entry that is shaded has been rejected because of one of the reasons
listed above or failure of the outlier test. The fifth and sixth columns are a measure of laboratory
precision. The Range analysis is a normalized value that you may use to keep precision control
charts. If this value is between 2.0 and 3.0, your analytical process precision is in the warning
zone; if it exceeds 3.0 it is out of control. The eighth and ninth columns are the differences from
the mean of all non-outliers and from the known value, respectively. A tag symbol may appear in
the last column. Each page with tags has a symbol definition summary at the bottom. If there is
no tag symbol, the data is within the control limits, but it may be in the warning zone.
The third part is a three-column listing of result average, tag symbol, and lab-code in average
order excluding those labs not responding properly. In this order, all outliers and out-of-control
results appear at the top or bottom of the list.
The last part is two bar chart displays showing frequency distributions of responding
participants. The first chart places the known value at the center and a bar at each 0.2 unit of
expected precision. The second chart places the mean of the reported measurements at the center
and a bar at each 0.2 unit of standard deviation. In both cases, a bar includes those results within
0.1 unit up to the maximum of six. Any results more than six units from the center value are
shown cumulatively by a shaded bar one past the sixth unit. If the central tendency of the known
value distribution falls away from the center, an error in accuracy is indicated. If the distribution
is broad, poor precision is indicated. The mean value distribution is similar but uses the average
and standard deviation of reported results as its basis.
-------
2/30 CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
The Range Analysis(R + SR) is calculated from the range, mean range and standard error of
the range values. The range is the difference between the maximum and minimum results for the
laboratory. The mean range is calculated by multiplying the expected precision by 1.693(for three
results). The standard error of the range is calculated by multiplying the mean range by 2.575(for
three results), subtracting the mean range from this product, and dividing the result by 3. If the
range is greater than the mean range, then the range analysis is calculated by subtracting the
mean range from the range, dividing the result by the standard error of the range and adding 1.
If the mean range is greater than or equal to the range, then the range analysis is calculated by
dividing the range by the mean range.
The normalized deviation of the mean from the grand average is calculated from the deviation
of the mean from the grand average and the standard error of the mean values. The deviation of
the mean from the grand average is calculated by subtracting the grand average from the
average of the laboratory's three results. The standard error of the mean is calculated by
dividing the expected precision by the square root of 3(the number of results). The normalized
deviation of the mean from the grand average is calculated by dividing the deviation of the mean
from the grand average by the standard error of the mean.
The normalized deviation of the mean from the known value is calculated from the deviation of
the mean from the known value and the standard error of the mean values. The deviation of the
mean from the known value is calculated by subtracting the known value from the average of the
laboratory's three results. The standard error of the mean is calculated by dividing the expected
precision by the square root of 3(the number of results). The normalized deviation of the mean
from the known value is calculated by dividing the deviation of the mean from the known value by
the standard error of the mean.
A complete explanation of the statistical calculations involved in the report may be found in
the Environmental Radioactivity Performance Evaluation Studies Program information brochure
[Draft Revision of EPA-600/4-81-004], available from George Dilbeck, CRD-LV, 702/798-2104.
-------
CKD-LV Performance Evaluation: Blind-A, 18-Apr-1995
3/30
Gross Alpha Statistical Summary 194 Participants
The known value of this nuelide is 47.5 pCi/1 with an expected precision of 11.9; the control limits
are 26.9 to 68.1; the warning regions are 26.9 to 33.7 and 61.3 to 68.1
36(18.6 %) Failed to respond ^
1 (O.5 %) Outliers '
1O(5.2 %) Out of control *'
but not an outlier
Statistic
, 132(68.0 %) Within all limits
Respondents
15(7.7 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
%Coef. ofVar.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
56.42
70.05
4906.76
124.16
18.77
0.13
50.58
6.49
0.04
Grand Avg 50.90
10.06
101.12
19.76
7.16
0.34
50.47
6.25
0.30
11 (7.O %) More than 3 norm. S.D. .
15(9.5 %) Between 2 and 3 norm. S.D.'
4(53.2 %) Within 1 norm. S.D.
of known value
48(30.4 %) Between 1 and 2 norm. S.D.
-------
4/30
CRD-LV Performance Evaluation: Blind-A, 18- Apr- 1995
Gross Alpha
Lab
A
AE
AF
AH
AI
AJ
AK
AL
AO
AP
AR
AU
AW
AZ
BA
BB
BC
BG
BH
BK
BL
BM
BN
BO
BS
BW
C
CA
CE
CG
CJ
CK
CM
CO
CP
CQ
CS
CX
D
DB
DD
DE
DG
DJ
DL
Res. 1
53.6
49.9
65.0
50.9
44.3
51.6
62.1
40.8
61.4
56.0
40.3
61.3
48.7
51.7
69.0
52.3
46.6
47.8
76.2
42.6
50.6
45.4
41.1
53.0
57.6
42.0
48.4
50.8
33.0
53.0
46.2
54.3
42.3
49.1
49.4
59.8
Res. 2
51.8
51.7
66.0
52.4
57.2
52.3
59.7
43.5
62.7
50.0
41.3
63.5
50.4
54.2
70.8
48.2
46.1
49.3
68.6
45.2
49.6
45.5
42.3
53.5
54.4
40.0
45.6
50.8
33.0
54.0
49.4
54.6
50.4
49.7
49.7
59.9
Res. 3
49.0
50.5
52.0
43.2
55.1
58.1
59.5
48.0
60.2
49.0
39.6
57.7
50.1
50.6
70.4
55.5
46.4
49.7
66.4
42.5
51.2
45.6
41.8
56.9
59.7
37.0
44.4
49.7
34.0
57.0
44.1
50.9
52.0
51.0
53.4
60.0
3 No data submitted
0 3
Insufficient
data
x =
Exper.
Sigma
2.32
0.92
7.81
4.94
6.92
3.57
1.45
3.64
1.25
3.79
0.85
2.93
0.91
1.84
0.94
3.66
0.25
1.00
5.14
1.53
0.81
0.10
0.60
2.12
2.67
2.52
2.05
0.64
0.58
2.08
2.67
2.06
5.20
0.97
2.23
0.10
Rnganal
(R + SR)
0.228
0.089
0.695
0.457
0.640
0.323
0.129
0.357
0.124
0.347
0.084
0.288
0.084
0.179
0.089
0.362
0.025
0.094
0.486
0.134
0.079
0.010
0.060
0.194
0.263
0.248
0.199
0.055
0.050
0.199
0.263
0.184
0.481
0.094
0.199
0.010
Normalized deviation
Average
51.47
50.70
61.00
48.83
52.20
54.00
60.43
44.10
61.43
51.67
40.40
60.83
49.73
52.17
70.07
52.00
46.37
48.93
70.40
43.43
50.47
45.50
41.73
54.47
57.23
39.67
46.13
50.43
33.33
54.67
46.57
53.27
48.23
49.93
50.83
59.90
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known) Tag
0.08
-0.03
1.47
-0.30
0.19
0.45
1.39
s t \^ $
-0.99
1.53
0.11
-1.53
1.45
-0.17
0.18
2.79
0.16
-0.66
-0.29
2.84
-1.09
-0.06
-0.79
-1.33
0.52
0.92
-1.64
-0.69
-0.07
-2.56
0.55
-0.63
0.34
-0.39
-0.14
-0.01
1.31
ft s Above
li s Below
0.58
0.47
1.96
0.19
* V
0.68
0.95
1.88
*' -
-0.49
2.03
0.61
-1.03
1.94
0.33
0.68
3.28 ft
"- : , * v'
0.65
-0.16
.... ,y.
0.21
3.33 ft
-0.59
0.43
. ^
-0.29
-0.84
1.01
1.42
-1.14
-0.20
*
0.43
-2.06
1.04
-0.14
0.84
0.11
0.35
0.49
1.80
\» .
*, -
*
control limit
control limit _,
-------
CRD-LV Performance Evaluation: Blind-A, lg-Apr-1995
ix
5/30
Gross Alpha
Lab
DM
DO
DS
DT
DZ
E
EB
-"".v-".
Eli";
EO
ER
EV
EX
FF
FJ
FL
FN
FU
FZ
GE
GI
GQ
GT
GZ
HI
HK
HL
HP
I
1C
ID
J
JE
JG
JN
JQ
JS
JY
K
KE
KT
KX
L
LF
LG
LL
Res. 1
.; ';'":'.*v
" -, 7"r x*
51.7
52.0
41.8
49.0
55.6
.. " "s -w \" ^^ ^ " ::v'v':3
%% "' -. % * - J"*""11 - ."" "i
44.0
58.3
43.6
" \
52.0
41.8
36.5
47.1
49.8
59.0
s x
"
33.2
47.5
54.1
52.0
65.1
54.9
43.8
41.0
53.9
45.1
54.5
45.6
51.0
61.5
54.8
53.8
58^9
70.8
45.0
53.0
51.0
34.0
7 ' " '' ^Vy ^ " *
35.0
Res. 2
7 * *-.";
;'xVi7\s .\
52^6
55.0
41.2
51.0
57.8
.. \x "''"">- ^jr**^ < __ ._
47.0
55.5
41.8
51.0
45.7
41.5
47.1
49.8
53.0
-
"*
30.9
37.7
54.4
55.0
63.9
54.9
44.4
38.5
52.3
47.0
55.9
48.8
49.5
57.7
55.6
57.6
v. ' * \ "
61.1
86.2
50.0
61.0
51.0
28.0
\'!v 0'"~"7-.x,'-
37.1
Res. 3
, x«" - v _>
54.8
59.0
41.6
51.0
57.4
__-. __ -.,.... v o ;,_
45.0
53.9
46.3
50.0
41.6
34.5
44.0
52.8
56.0
-
32.1
33.8
53.9
57.0
61.7
54.9
43.1
37.3
55.4
44.8
47.6
45.1
49.7
57.9
50.5
54.0
65.9
76.5
55.0
61.0
51.0
33.0
v"_% \^ ,
33.8
s No data submitted
0 =
Insufficient
data
x. =
Exper.
Sigma
r -- .
- '- . 1\
1.59
3.51
0.31
1.15
1.17
""" s i >i'" " \ v v T^^
, -v \ - ' i
1.53
2.23
2.26
1.00
2.31
3.61
1.79
1.73
3.00
1.15
7.06
0.25
2.52
1.72
0.02
0.65
1.89
1.55
1.19
4.44
2.01
0.81
2.14
2.74
2.14
3.58
7.79
5.00
4.62
0.00
3.21
" v
1.67
Rnganal
(R + SR)
-, -.; v
0.154
0.347
0.030
0.099
0.109
s, ^^ "*''
0.149
0.218
0.223
0.099
0.204
0.347
0.154
0.149
0.298
0.114
0.680
0.025
0.248
0.169
0.000
0.065
0.184
0.154
0.109
0.412
0.184
0.074
0.189
0.253
0.189
0.347
0.764
0.496
0.397
0.000
0.298
0.164
Normalized deviation
Average
: :j:4;:^
'^Cv'iV'vJtf
53.03
55.33
41.53
50.33
56.93
yv\s. K ^ ^s-.s w^w.w.%.^
" \ r-\ - - ^^;V
45.33
55.90
43.90
51.00
43.03
37.50
46.07
50.80
56.00
/
32.07
39.67
54.13
54.67
63.57
54.90
43.77
38.93
53.87
45.63
52.67
46.50
50.07
59.03
53.63
55.13
61.97
77.83
50.00
58.33
51.00
31.67
- **^> ,y"^;j!i:
35.30
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known) Tag
g=f ;>;;') ^;i|'
^^x,;F;f\S:^
0.31
0.64
-1.36
-0.08
0.88
v"* ^-w''s''i_'""i^%A'-j5s'- ^^ '^
" " ^^^ *^' " *5\
-0.81
0.73
-1.02
vV%", '' '^ A-'
0.01
-1.15
-1.95
-0.70
-0.01
0.74
X > ^
, v , s-
-2.74
-1.64
0.47
0.55
1.84
0.58
-1.04
-1.74
0.43
-0.77
0.26
-0.64
-0.12
1.18
0.40
0.62
- {- h'~ ~~ ^' ;,,*r\
1.61
3.92
-0.13
1.08
0.01
-2.80
~-; !:- o>X *; Vs^ - >X
-2.27
tf = Above
U = Below
iS^>v^>-x
^v.|Ci V\ ^ ,,^ ,,^>. t-\ ^
0.81
1.14
-0.87
0.41
1.37
'^x'^VJ's'"'?"' "0 ^ ^"T^v
-;\t ^ *^ >" Vj ^ >r^.
-0.32
1.22
-0.52
- - '"; ' 7' *"
0.51
-0.65
-1.46
-0.21
0.48
1.24
^"' r ^»
^ x "^ "
-2.25
-1.14
0.97
1.04
2.34
1.08
-0.54
-1.25
0.93
-0.27
0.75
-0.15
0.37
1.68
0.89
1.11
X - ":, V-"?- '
2.11
4.42 tT
0.36
1.58
0.51
-2.30
,<-\ \ ^f\ *'\ -
-1.78
control limit
control limit
-------
6/30
1
CRD-LV Performance Evaluation: Blind-A, 18- Apr- 1995
Gross Alpha
Lab
LR
LT
M
MA
MF
MP
MQ
MV
MY
N
NA
NH
NI
NJ
NK
NO
NT
0
OF
OS
OX
OY
OZ
P
PA
PB
PG
PI
PM
PQ
PR
PV
PW
Q
QC
QJ
OP
QQ
QT
QU
QW
QX
QY
QZ
RD
Res. 1
43.0
47.5
75.0
*^ ," t
61.6
51.0
52.0
53.5
48.1
65.0
48.6
32.4
51.5
53.0
48.6
52.4
49.5
'"'> ' '' ' '
874.0
55.4
84.0
33.4
49.8
77.5
38.2
45.7
44.0
48.1
50.4
39.8
38.3
53.0
53.2
48.1
28.2
33.8
48.4
42.5
46.0
Res. 2
44.0
42.1
80.0
'" ',;." ° -
61.8
' <",
49.0
53.0
' " ' " '
58.8
48.6
72.0
't/
45.9
32.4
54.5
54.0
54.1
56.4
47.8
- X -'
978.0
61.0
87.4
34.9
52.7
67.0
40.6
46.2
41.0
51.4
47.2
39.9
35.1
46.0
59.4
44.0
30.0
37.3
49.7
43.0
53.0
Res. 3
46.0
44.1
72.0
, , ,«.
60.0
53.0
58.0
51.3
48.5
61.0
40.0
35.5
57.3
53.5
47.9
68.4
51.1
915.0
62.0
82.0
40.7
50.7
71.2
39.4
39.4
39.0
55.8
' *'*' .
45.3
40.0
39.3
47.0
66.5
50.7
32.2
35.6
50.7
42.9
51.0
= No data submitted
0 3
Insufficient
data
x =
Exper.
Sigma
1.53
2.73
4.04
0.99
2.00
3.21
3.86
0.26
5.57
4.40
1.79
2.90
0.50
3.40
8.33
1.65
52.39
3.56
2.73
3.86
1.48
5.28
1.20
3.79
2.52
3.86
' ' - % / s
2.58
0.10
2.19
3.79
6.66
3.38
2.00
1.75
1.15
0.26
3.61
Rnganal
(R + SR)
0.149
0.268
0.397
0.089
<
0.199
0.298
0.372
0.025
0.546
0.427
0.154
0.288
0.050
0.308
0.794
0.164
-
8.928
0.328
0.268
0.362
0.144
0.521
0.119
0.338
0.248
0.382
0.253
0.010
0.208
0.347
0.660
0.333
0.199
0.174
0.114
0.025
0.347
Normalized deviation
Average
44.33
44.57
75.67
61.13
"" ;' ': -'
51.00
54.33
54.53
48.40
66.00
44.83
33.43
54.43
53.50
50.20
59.07
49.47
922.33
59.47
84.47
36.33
51.07
71.90
39.40
. 43.77
41.33
51.77
s1 ' '* \ '''
47.63
39.90
37.57
48.67
59.70
47.60
30.13
35.57
49.60
42.80
50.00
TAG SYMBOLS
Determined
to be an outlier
(grand-avg)
-0.96
-0.92
3.60
":; >-V-v-', :"»
1.49
- 's, \ ^-C-
0.01
0.50
"\ , ** %,_-
0.53
-0.36
2.20
* ' ' * \
-0.88
-2.54
0.51
0.38
-0.10
1.19
-0.21
- '"'',,. , v~~
126.84
1.25
4.89
-2.12
0.02
3.06
-1.67
-1.04
-1.39
0.13
-0.48
-1.60
-1.94
-0.33
1.28
-0.48
-3.02
-2.23
-0.19
-1.18
-0.13
(known) Tag
-0.46
-0.43
_4.io_ it
^^^""^
1.98
' ' '^ r;>*-
0.51
0.99
- :"'- - " *-
1.02
0.13
2.69
V'-Tf ' - .*";
-0.39
-2.05
1.01
0.87
0.39
1.68
0.29
",'.'-\'> ' \* -
127.33 X
1.74
5.38 tt
-1.63
0.52
3.55 ft
*
-1.18
-0.54
-0.90
0.62
-* , - , ''»._
0.02
-1.11
-1.45
0.17
1.78
0.01
-2.53
-1.74
0.31
:' , - , ,
-0.68
0.36
ft = Above control limit
11 s Below control limit _,
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
, Gross Alpha
Lab Res. 1
RE
RF
RG
RJ
RK
RP
RR
RV
RZ
S
sc
SD
SF
SI
SL
SM
SN
SO
SR
ss
ST
sx
sz
T
TD
TE
TH
TI
TL
TN
TQ
TS
TY
U
UA
UE
UG
UK
UN
UP
UQ
UW
VA
VC
55.3
46.7
49.0
33.3
38.0
46.0
55.1
56.8
45.8
69.1
57.1
63.8
52.8
66.4
60.4
48.7
55.0
50.2
41.0
40.7
49.9
43.2
52.5
63.0
51.0
56.4
57.8
45.3
43.6
50.3
55.0
76.6
49.2
50.2
31.4
47.2
68.0
54.8
49.4
\ < ^
Res. 2
51.2
45.3
39.0
37.8
43.0
64.0
56.0
56.4
36.9
63.8
58.7
66.1
56.0
68.9
59.6
47.7
55.0
52.8
39.8
36.0
53.2
44.9
46.8
69.0
45.0
58.4
58.1
44.2
35.9
45.7
56.0
85.8
56.3
43.7
33.5
48.6
69.0
53.1
54.2
Res. 3
43.6
47.8
47.0
30.8
43.0
63.0
54.4
56.1
47.0
68.5
62.3
67.4
67.6
73.0
47.2
48.9
55.0
49.4
48.3
36.0
49.3
43.3
50.8
65.0
49.0
54.4
64.0
43.4
38.4
50.9
53.0
68.2
48.0
48.3
35.7
48.4
70.0
52.6
51.5
""---. i "\
s No data submitted
. 0 =
Insufficient
data
X s
Exper. Rng anal
Sigma (R + SR) Average
5.94
1.25
5.29
3.55
2.89
10.12
0.80
0.35
5.52
2.90
2.66
1.82
7.79
3.33
7.40
0.64
0.00
1.78
4.60
2.71
2.10
0.95
2.93
3.06
3.06
2.00
3.50
0.95
3.93
2.84
1.53
8.80
4.49
3.34
2.15
0.76
1.00
1.15
2.41
0.581
0.124
0.496
0.347
0.248
0.893
0.079
0.035
0.501
0.263
0.258
0.179
0.735
0.328
0.655
0.060
0.000
0.169
0.422
0.233
0.194
0.084
0.283
0.298
0.298
0.199
0.308
0.094
0.382
0.258
0.149
0.874
0.412
0.323
0.213
0.069
0.099
0.109
0.238
\ \ '
50.03
46.60
45.00
33.97
41.33
57.67
55.17
56.43
43.23
67.13
59.37
65.77
58.80
69.43
55.73
48.43
55.00
50.80
43.03
37.57
50.80
43.80
50.03
65.67
48.33
56.40
59.97
44.30
39.30
48.97
54.67
76.87
51.17
47.40
33.53
48.07
69.00
53.50
51.70
- * ",!.*.. -.\ '-." "*
TAG SYMBOLS
Determined to
be an
outlier
..._. .. ,
7/30
Normalized deviation
(grand-avg) (known) Tag
-0.13
-0.63
__-0.86_^
-2.46
-1.39
0.98
0.62
0.81
-1.12
2.36
1.23
2.16
1.15
2.70
0.70
-0.36
0.60
-0.01
-1.15
-1.94
-0.01
-1.03
-0.13
2.15
-0.37
0.80
1.32
-0.96
-1.69
-0.28
0.55
3.78
0.04
-0.51
S v
,,
-2.53
-0.41
2.63
0.38
0.12
\ ^X-" V v.V.v1' .... - "*
ft s Above
Ji = Below
0.37
-0.13
^0.36 _
-1.97
-0.90
1.48
1.12
1.30
-0.62
2.86
1.73
2.66
1.64
3.19 IT
1.20
0.14
1.09
0.48
-0.65
-1.45
0.48
-0.54
0.37
2.64
0.12
1.30
1.81
-0.47
-1.19
0.21
1.04
4.27 IT
0.53
-0.01
^ *
-2.03
0.08
3.13 ft
0.81 m
0.61
~-'^sv v ;
control limit
control limit
*y
-------
1
8/30 CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
Gross Alpha
Lab Res. 1 Res. 2
VG 40.3 41.4
VI 45.6 52.6
VJ 41.3 42.1
VM ' V -"' ' - ;.. .,
VN '. ' , "
VO 35.8 39.8
VQ
VT 51.8 50.5
vu
W 63.4 64.6
WE 81.3 83.8
WF 32.2 33.6
X 41.7 39.2
Z "" -- '!;-* /
Exper. Rng anal
Res. 3 Sigma (R + SR)
41.5 0.67 0.060
51.6 3.79 0.347
40.4 0.85 0.084
' -
38.9 2.10 0.199
53.0 1.25 0.124
66.5 1.56 0.154
81.0 1.54 0.139
27.5 3.20 0.303
40.2 1.26 0.124
Normalized deviation
Average (grand-avg) (known)
41.07 -1.43 -0.94
49.93 -0.14 0.35
41.27 -1.40 -0.91
' * ' ^' '' f ''
38.17 -1.85 -1.36
51.77 0.13 0.62
_." j > ' * .-"-
64.83 2.03 2.52
82.03 4.53 5.03
31.10 -2.88 -2.39
40.37 -1.53 -1.04
'.-"'«"
Tag
',' *;""''
:\ * ,
> »
, /
It
11 J" "" "i
^ -
Data sorted by Laboratory Average
Average Tag
30.13
31.10
31.67
32.07
33.33
33.43
33.53
33.97
35.30
35.57
36.33
37.50
37.57
37.57
38.17
38.93
39.30
39.40
39,67
39.67
39.90
40.37
40.40
41.07
41.27
41.33
41.33
41.53
= No data submitted
0 = Insufficient data
Lab Average Tag
QU 41.73
WF 42.80
LF 43.03
GQ 43.03
CP 43.23
NK 43.43
UN 43.77
RK 43.77
LL 43.80
QW 43.90
PA 44.10
FL 44.30
QJ 44.33
SX 44.57
VO 44.83
I 45.00
TQ 45.33
PM 45.50
GT 45.63
CJ 46.07
QC 46.13
X 46.37
AW 46.50
VG 46.57
VJ 46.60
RR 47.40
PR 47.60
DZ 47.63
TAG SYMBOLS
Lab Average Tag
CA 48.07
QZ 48.23
ST 48.33
FJ 48.40
SC 48.43
BO 48.67
PQ 48.83
HP 48.93
T 48.97
EV 49.47
AP 49.60
TN 49.73
LR 49.93
LT 49.93
NJ 50.00
RG 50.00
EO 50.03
C 50.03
ID 50.07
FN 50.20
CK 50.33
BK 50.43
JE 50.47
CS 50.70
RF 50.80
UE 50.80
QT 50.80
Q 50.83
ft = Above control
x = Determined to be an outlier . li = Below control
Lab
UP
D
TH
NA
SO
QP
AH
BM
TS
OS
QX
BA
VI
DB
RD
KT
TD
RE
JG
0
E
CO
BS
AE
FU
SZ
ss
DD
limit
limit
y
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
Gross Alpha
9/30
Data sorted by Laboratory Average
Average Tag
51.00
51.00
51.00
51.07
51.17
51.47
51.67
51.70
51.77
51.77
52.00
52.17
52.20
52.67
53.03
53.27
53.50
53.50
53.63
53.87
54.00
54.13
54.33
54.43
% responding labs
Lab
MQ
L
FF
PB
UA
A
AU
VA
VT
PV
BH
BB
AJ
J
DS
CX
UW
NT
JQ
1C
AK
GZ
MV
NO
Average Tag
54.47
54.53
54.67 .
54.67
54.67
54.90
55.00
55.13
55.17
55.33
55.73
55.90
56.00
56.40
56.43
56.93
57.23
57.67
58.33
58.80
59.03
59.07
59.37
59.47
59.70
Frequency distribution
Lab
CE
N
TY
m
CQ
HL
SR
JS
RZ
DT
SN
ER
FZ
TI
S
EB
CG
RV
KX
SL
JN
OF
SF
oz
QQ
Average
59.90
59.97
60.43
60.83
61.00
61.13
61.43
61.97
63.57
64.83
65.67
65.77
66.00
67.13
69.00
69.43
70.07
70.40
71.90
75.67
76.87
77.83
82.03
84.47
922.33
Tag
tt
tr
tt
tr
tr
tt
tt
it
tt
tt
X
Lab
DE
TL
AL
AZ
AF
MF
AR
K
HK
W
TE
SI
NH
SD
UQ
SM
BC
BN
PG
M
U
KE
WE
P
OY
-6 -4
-..---Illllllllll
-2 0
_
+2
+4
+6
Normalized deviation of the mean from the known value
% responding labs
10-
-6 -4
= No data submitted
0 s Insufficient data
Frequency distribution
________________ _ _ _ _ _ _ _
!!
-....-llllllllll.ll
Normalized deviation of the mean from
I-- __
72 T
the grand average
TAG SYMBOLS It =
x = Determined to be an outlier U 3
J4
Above control
Below control
+6
limit
limit
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
10/30
Radium-226 Statistical Summary 194 Participants
The known value of this nuclide is 14.9 pCi/1 with an expected precision of 2.2; the control limits
are 11.1 to 18.7; the warning regions are 11.1 to 12.4 and 17.4 to 18.7
87(44.8 %) Failed to respond
7(3.6 %) Outliers
9(4.6 %) Out of control
but not an outlier
Statistic
85(43.8 %) Within all limits
Respondents
- 6(3.1 %) In warning zone
but within control
.
Non-outliers
Mean
Std. Dev.
Variance
%Coef. ofVar.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
14.74
3.03
9.20
20.58
-1.10
-0.05
14.67
-1.57
-0.08
Grand Avg 14.66
1.96
3.83
13.36
-1.64
-0.13
14.62
-1.90
-0.14
16(15.O %) More than 3 norm. S.D. ,
6(5.6 %) Between 2 and 3 norm. S.D
1(57.O %) Within 1 norm. S.D.
of known value
24(22.4 %) Between 1 and 2 norm. S.D.
-------
11/30
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
Radium-226
Lab
A
AE
AF
AH
AI
AJ
AK
AL
AO
AP
AH
AU
AW
AZ
BA
BB
BC
BG
BH
BK
BL
BM
BN
BO
B8
BW
C
CA
CE
CG
CJ
CK
CM
CO
CP
CQ
CS
CX
D
DB
DD
DE
DG
DJ
DL
=
0 s
Res. 1
15.0
13.2
14.7
20.6
14.2
16.7
13.2
15.1
12.7
13.8
16.9
14.1
14.8
13.3
14.1
15.8
15.6
12.7
15.5
13.9
11.9
17.0
16.0
11.9
' % V^ ^
14.8
15.5
{ * ". -.
Res. 2 Res. 3
14.6
13.5
14.7
14.6
-'
14.9
17.9
13.7
''.'-
15.3
-
12.5
13.4
15.2
13.3
16.4
I ' * V
14.1
13.8
* "" %\ f" "
16.7
17.7
12.7
15.6
13.2
13.4
15.0
16.0
10.6
'
-..,-' r .
". ~'\ V' *" ' ; "
14.3
15.6
1 "' ^
x *
'' " - "" - f ^
14.8
13.7
14.2
16.3
14.6
17.7
13.9
15.7
12.5
13.9
18.4
14.1
14.9
13.7
14.1
15.0
15.3
13.3
15.6
13.0
13.9
14.5
15.0
12.1
"v ^ *
14.5
15.6
No data submitted
Insufficient
data
X 3
Exper.
Sigma
0.20
0.25
0.29
3.09
0.35
0.64
0.36
0.31
0.12
0.26
1.60
0.46
0.90
0.40
0.17
0.85
1.31
0.35
0.06
0.47
1.04
1.32
0.58
0.81
' ' - - -.-'''''
0.25
0.06
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.107
0.134
0.134
2.164
0.188
0.322
0.188
'
0.161
0.054
0.134
0.859
0.215
0.430
0.215
0.081
0.456
0.644
0.161
0.027
0.242
0.537
0.671
0.268
0.403
0.134
0.027
14.80
13.47
14.53
17.17
14.57
17.43
13.60
, ; ' ". \
15.37
12.57
13.70
16.83
13.83
15.37
13.70
14.00
-' '!'- ' -1
15.83
16.20
12.90
15.57
13.37
13.07
15.50
15.67
11.53
s ,* ; " "
. N V V ^ "
14.53
15.57
- , , " ' ' \ ~
TAG SYMBOLS
Determined
to be an
outlier
0.11
-0.94
-0.10
1.98
-0.07
2.19
-0.83
, - - x; - ,_ -
0.56
> , . , ' -'
-1.64
-0.75
1.71
-0.65
0.56
,-
-0.75
-0.52
-: - "-,,!
0.93
1.22
-1.38
0.72
-1.01
-1.25
0.67
0.80
-2.46
<
V '; "*' '" '
-0.10
*
0.72
tt = Above
U 3 Below
-0.08
-1.13
-0.29
1.78
>
-0.26
1.99
-1.02
';*',- " '->*,'
0.37
*
-1.84
-0.94
1.52
-0.84
\" ' * '''-'
0.37
,' ' '"*''-
-0.94
-0.71
"7" , '>*t;'*
0.73
1.02
-1.57
"' ' * :'
V »'
0.52
-1.21
-1.44
0.47
0.60
-2.65
.
" , , 9
,- ,; '-""A\
'' * '.
. - *
'\ /' \-'*'-!-
;;-.^'--y^;»^
-0.29
.: '"'*,'
0.52
s':" ', '*'**
-" - * -
' * " »,
control limit
control limit _,
-------
CRD-LV Performance Evaluation: Blind-A, 18- Apr- 1995
12/30
Radium-226
Lab
DM
DO
DS
DT
DZ
E
EB
EL
EO
ER
: EV
EX
;FF
FJ
FL
FN
FU
FZ
GE
JGI
1 GQ
GT
GZ
m
HK
HL
HP
I
1C
ID
J
JE
JG
JN
JQ
JS
JY
K
KE
KT
KX
L
LF
LG
LL
Res. 1
"*
O f . s
14.3
14.4
13.8
15.8
14.0
14.7
14.2
*
X v ^ s \ J
<- "
12.2
3.4
14.9
x
14.2
14.0
15.8
15.6
12.5
14.1
19.0
9.3
15.9
11.1
13.9
Res. 2
'-vyy,
! '-, s ,'*',
^ \. "^ ""
13.7
14.7
13.9
15.8
14.9
14.5
14.3
"-"V"' v
*'Vi !
. " >
' ' -~\
'"C'"
13.9
3.3
-
v v
14.2
^
x
15.2
14.0
14.4
16.6
13.1
15.6
17.6
11.2
- -
16.2
x> '\ "
12.9
-. fO <. -.
14.1
vt
Res. 3
^ " - \ " "" x ^
;. ^ ' \
13.0
14.4
13.1
15.7
15.5
15.3
14.7
Y , *--
~ t* * * *'
"* "" "
,^x -v v V- \
14.4
3,3
'
\
15.7
V
14.2
14.3
15.1
15.2
11.3
15.4
18.3
11.2
-?,,
11.9
\"' --, -
13.4
, ' - - -
13.8
= No data submitted
^0 BE
Insufficient
data
x =
Exper.
Sigma
* \ ^ '^ "" -. "
.. ' ^' \ ^ - *
0.65
0.17
0.44
0.06
0.75
0.42
0.26
' \
v S J1
';; v-«;\\- " ^
1.15
, 0.06
v
A s N
0.75
-- -
0.58
0.17
0.70
0.72
0.92
0.81
0.70
1.10
2.40
1.21
s '
0.15
Rnganal
(R + SR)
'> - ^ X
0.349
0.081
0.215
0.027
0.403
0.215
0.134
_ --;
'- , s
v ' -\"
0.591
\- ,/ "
,0i027.
% \ h ~ , ~- -;
0.403
0.268
0.081
0.376
0.376
0.483
0.403
0.376
0.510
%-. ,, -.
1.294
0.618
- * ;
t ^
- , - "
0.081
Normalized deviation
Average
v- \ \ x ' %
' ! '' °^\\
x;~-v:; '$]-; ^
13.67
14.50
13.60
15.77
14.80
14.83
14.40
" "\^^^^^ { " ^^
« ""^^ -k1" C1'*!""
! V.'"'~ -""^'--'v'S-''
o' 0 "" ^ ^
" "" " 'v"'-^V^-
13.50
; s s\"
-; " \3.33V
'"' /-"" ''-^v ^ *S-> ^"''r
"^- .:rAv
14.93
," " - ;,, - . "x
s ^ \ v ^^
'' -.-.''
14.53
14.10
15.10
15.80
12.30
15.03
18.30
10.57
* * ^ ^ ^
,^'*' .v
; "~ ". -\x
14.67
12.47
* sss \ % v % - A-.. -A
-., ^ ," ^
- . " S \ s
13.93
' , /'" - :'
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known) Tag
-^'"^ ;^-/' , -H-^:- %1
,,-- ; - -' ;^>S s "C>\ f V
^V" i;-.\<" '> -,',' s~
-0.78
-0.12
-0.83
0.88
0.11
0.14
-0.20
"^ ^ , \
" "" ^^ ^
- .,"-*' - -
:% -',-;;'- - '"'X. \ >
^f-^^^x.1;^ * -\;
-0.91
! r*"1 ~ "'"^';\
,;/: -8^1>-->:
^ t\ ' - V ^ ''
Kf, \^ , -\-- -\
0.22
~-s x ''
-0.10
-0.44
0.35
0.90
-1.85
0.30
2.87
-3.22
' '?/ - " ' ^ *-' ' '
^v:v "'<> , .-;
0.01
1 -», ,/ '
-1.72
" *:s"\' '';' '* A~
V'
-0.57
V
" , : °"> "
1
It = Above
U = Below
\--\^-J'^»U
v^vrl- -'V1 ' ^ < ^'
xS^^^^S^xV^
-0.97
-0.31
-1.02
0.68
-0.08
-0.05
-0.39
-;V,47>:'-4frx»~;
l"\ ^ J \ ^^^ ',_
,.-";:!- -V ';»-i;,*
' ^y^x ; vf :Vx-
,:'-xi-V^-^"^t"
-iT^^xV^-t
-1.10
; , y- :r^i<«\vi
'-O.ll-'^xffX
\^^^;^*t^"'
SSS: "t^>
0.03
-V^ V- \ ;-/*x >
s-^- 'X<:'-
.- \;vV;J
-0.29
-0.63
0.16
0.71
*
-2.05
0.10
2.68
-3.41 U
,-v,.r' - ,-\ /?,
/;,v .v^\>
-0.18
-"- \'"y '*'"'
-1.92
;" ' vj , ,':-\-V^^r,
, s ^{^vh\*,v\-
\ '-' - i>.
-0.76
-V»'
7v°"<:--V*v
1 ,'Y: -\V^
control limit
control limit
-------
13/30
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
Radium-226
Exper. Rng anal
Lab
TJB-,
JL4&V
LT
M
MA
MF'
MP
MQ
MV
MY
N
NA
NH
NT
NJ
NO
NT
O
OF
OS
OX
OY
OZ
P
PA
PB
PG
PI
PM
PQ
PB
PV
PW
Q
QC
QJ
QP
QQ
QT
QU
QW
QX
QY
QZ
RD
Res. 1
270
'A f *V
14.8
15.5
15.7
16.1
20.6
15,2
14.6
10.9
15.3
14.8
18.0
14.7
13.9
9.3
10.8
16.0
16.0
14.9
17.4
9.4
7.2
21.8 ;
15.1
13.0
14.2
Res. 2
250
*mjii\f j ' ,
14.7
15.8
' "" f ' ' f- s
','."- '' -
, '^^
14.0
17.2
18.3
15.7
15.3
11.6
15.2
14.0
18.3
14.6
12.7
"
11.7
10.6
17.8
15.7
j %
15.0
16.3
7.6
' >. ;7.7' ..;
-22;4, ">
15.0
14.8
14.2
Res. 3
- 240
jCrT.V
12.9
16.9
vv-;>' <":-
' v-/ ';/
>
13.9
15.9
18.5
16.3
16.0
14.0
15.1
14.0
^
18.5
15.1
13.2
12.1
9.3
13.3
18.9
15.0
17.0
8.3
, 7.8
20.8
15.0
14.8
14.9
= No data submitted
0 =
Insufficient
data
x =
Sigma (R
1 S3
JLiCFU
1.07
0.74
"':''-' 7;'
Jv ~- ,*" -, "J
1.01
0.70
1.27
0.55
0.70
1.63
0.10
0.46
0.25
0.26
0.60
1.51
/ -
0.81
2.26
1.77
0.06
0.56
0.91
0.32
o;si
0.06
1.04
0.40
+ SR)
0 805
v*uvv
0.510
0.376
0.483
0.349
0.618
0.295
0.376
0.832
0.054
0.215
0.134
0.134
0.322
0.752
0.403
1.397
0.859
0.027
0.295
0.483
0.161
0.430
0.027
0.483
0.188
Average
2533
^wV+tl**
14.13
16.07
1 > %
- -; s
* '> ' '
' ; r ;/'J
>
14.53
" A I ~~
16.40
19.13
15.73
15.30
12.17
15.20
14.27
''" '" ' , - '* '
18.27
14.80
13.27
11.03
10.23
15.70
16.87
< J i
14.97
16.90
8.43
. _ 7.57*
. 21.67,
15.03
14.20
14.43
TAG SYMBOLS
Determined to be an outlier
Normalized deviation
(grand-avg) (known) Tag
841
-0.41
1.11
%>' '''~;' ' , ,--;;-' « "
,
i'-' -^ '- s / -:=
-0.10
1.37
3.53
0.85
0.51
-1.96
0.43
:0.31
' '*'' " *
2.84
0.11
-1.09
-2.85
-3.48
0.82
1.74
J '"'"'-. -.'''
0.25
1.77
-4.90
.,/ ' ^58'
; ^ ,-^6.52~ ' -/
0.30
-0.36
-0.17
ft = Above
U = Below
821'"" ^
-0.60
0.92
;?;, ";::> ~\;W;-
' ,"-*:'
,,;- , »' .,
"-''.. *'v
'» ' -! * '' '
' ' '
-0.29
/ , " * *'
1.18
, *
3.33 ft
0.66
0.31
' - ' *- '. >.
-2.15
'ff- * . J N 'lVl ""fVf''"^ '""
- ,
0.24
-0.50
,,.. ;,, , , ', 9 ,..,
2.65
*
-0.08
-1.29
, * 'i
*" -
-3.04 ^ _y
"" *'' '
-3.67 U
0.63
1.55
' *''-'* V
0.05
-.' ,- ';
1.57
-5.09 U
5.77" ;>"
\ *
5.33 - x . ,
0.10
-0.55.
-0:37
control limit
control limit
/
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
Radium-226
Lab Res. 1
RE
RF
Ttr*
^** ,
RJ
RK
HP
RR
RV
RZ
S
sc
SD
SF
SI
pSL
SM
SN
so
SR
ss
ST
sx
sz
T
TD
TE
TH
TI
TL
TN
TQ
TS
TY
U
UA
UE
UG
UK
UN
UP
UQ
UW
UY
VA
^
VC"
16.2
-- - - -, v-
-.
. - .. V!Y
14.1
K
11.8
14.1
16.3
17.0
14.2
13.5
,16A^
12.6
15.4
> * ", ' ' .
16.6
14.8
13.4
14.0
15.2
24.4
11.7
11.9
17.4
" " - 5;4 ":
20.8
17.4
18.9
11.7
14.0
11.4
14.5
14.6
15.3
' " , * »\ *" \
v -'* - -20.2V,
"^ "" v' * ''..'>
Res. 2 Res. 3
\' - o -r>, -
16.0
'"«',. " "-,,- ^
, '' "~'\ ^
. ,_,"' v \~\~ ^ ' ;' .-
12.1
-' '- ,\ -X- ~~t
" ^ ^s %;x " ^
" -l "-"" -,.-' VO- , "
15.8
14.2
16.4
16.5
15.1
13.3
14.3
v ,lv h h s"
12.9
>'-"' -.'"\«!-
16.5
-: ;'~ V \
14.7
15.3
13.6
15.1
14.4
16.7
15.0
11.9
15.2
>':X ! -~5,8/ -\ -\
21.4
17.2
21.6
- ' ,*' ~"'~ '"> -^ \%
10.8
" - x-"'; '*>,-,''"
13.6
\ '
"rr\'-~ ''
9.1
15.1
14.4
16.8
^ ^ --!; <* - % \^ ^ \
%s^-s' -.^x s % h % s--%
^ J, '''' is k s k
"-;' V .:lhX'i' -" \-
) ' -
15.0
- ~, ~ ~ \ ;
- , - ' C -
' ^ ^
13^7
y-'^,
";;^J'-'c
15.2
14.0
16.2
17.1
14.4
13.7
16.8
13.2
16.3
13.7
14.2
14.4
16.2
14.9
26.0
14.2
11.4
17.6
-&9:
19.4
17.0
21.0
10.5
15.2
9.6
15.0
15.7
J5.7_
20.6
i '' ""
= No data submitted
0 s
Insufficient
data
x =
Exper.
Sigma
"" " "" v
0.64
-.« v ' "^
^ s ° "" ^%
1.06
-\^»:s. -/-?
\ ^ s ^
2.16
0.10
0.10
0.32
0.47
0.20
1.34
\ " ^ s
0.30
' ' - s - ^V " .
0.59
1.47
0.55
0.53
1.10
0.40
4,97 ,
1.72
0.29
1.33
6.26
1.03
0.20
1.42
0.62
0.83
t
1.21
0.32
0.70
0.78
(.- s 1 v \ ' %
C 4.38- '
14/30
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
.- _ r;;:;
0.322
)^"^!"s-"\ *"'''-
> \ ^ s J
0.537
1 '-"^A
s ~-\ *
1.141
0.054
0.054
0.161
0.242
0.107
0.671
0.161
0.295
0.779
0.295
0.268
0.591
0.215
3.851
0.886
0.134
0.644
0434
0.537
0.107
0.725
0.322
0.430
0.618
0.161
0.349
0.403
3.493
- - ',' I'-Si- ' '!-"' 1V-^',,'
15.73
;", - ,Vx' "\-f~ Sl-<--,\^
- V,\ \Vr' \o^»'^YT
rft ^v %' * * * ^x*''
13.30
^ H-':^,TX J;V
-,- '>\^^>\-^^v
14.27
14.10
16.30
16.87
14.57
13.50
15.83
' ' ~s ''''-" s
12.90
-."^ - , " ^\ ^'"' s-."^;%. 4. "* ^
16.07
15.00
14.77
13.80
15.10
14.83
22.37
13.63
11.73
16.73
' V^'^'-B.TOT'''^
20.53
17.20
20.50
- "" * ^
11.00
"* ' - y '-' '4^.'-'
14.27
s " "" %
10.03
14.87
14.90
^ 15.93
"~ ^ '". '" V S'-Vs '
';- ^ t "26:37'' ; '
"v\'-^ ^ s s * * "" "" ^ ,, C"
\ s -." - % s ""''.
TAG SYMBOLS
Determined
to be an
outlier
x- N ;;;,-'- * ' -,
0.85
-\-x-\\«- ."-. "'?;-;
v*-;, * t \ '^\
.*-r. ;r:- .'/
-1.07
^^vs ; v-- ^
\,'-XX- ^ - :-'s!
-0.31
-0.44
1.30
1.74
-0.07
-0.91
0.93
f. s ,_ ^ ""*>, s
-1.38
~>,-C " '"> " - '\
1.11
^ ' , ' >o .> ,
0.27
0.09
-0.67
0.35
0.14
6.07 o
-0.80
-2.30
1.64
V»7'.05-T\A
4.63
2.00
4.60
-2.88
-0.31
s V \
" " !"
-3.64
0.17
0.19
^ ^1.01
-^v'T,^', :,-;>-.
s '"'"' '"'* % ^ . "'' V ^
\-<;"_\ _\_ ' V-~-
tt = Above
& = Below
*^~?:*iv-«o
0.66
^v>R;H^X 4;4 «\ ^f -' '$?v
^4T-\^\\^X^\A'*>r'''!
" :^t?^*^ \
-1.26
<-:^£v^St»%
f^\^'l?s^
-6.50
-0.63
1.10
1.55
-0.26
-1.10
0.73
v iVJi'
0.92
\vV>\>.. * *
0.08
-0.10
-0.87
0.16
-0.05
5.88 x-v
-1.00
-2.49
1.44
'-7J24''y'i>O'
4.44 ft
1.81
4.41 It
/V " »t\
-3.07 U
, fo - <"x »\-
-0.50
, v V '~*\',< .
,,->,:--< ?;; V:;-v
-3.83 U
-0.03
0.00
. .P-l1^,^ ^
^;!k:F;^f5r»^;
";;3;24X;^ x;;,-
'i.Vi\;', ,S;'C**''.<
control limit
control limit
-------
15/30 CRD-LV Performance Evaluation: Blind-A, 18- Apr- 1995
Radium-226
Lab Res. 1 Res. 2
vfl, .''*' - > " ' '
VI 14.7 13.0
VJ, '" ' . '' ','.-- ":~
-VM ' "' '
VN / -'<
vd ' - :" -" -.,
VQ
VT - ; '-
-vu , , - .
W 13^4 14.6
WE " '
WF
X 15.1 13.6
"SB -'V - ":-
^
Exper. Rng anal
Res. 3 Sigma (R + SR)
s - > ,' ,
14.8 1.01 0.483
; : ' ,^": "^ ' ' ;
* ' . " " ' >
' S-- -. " '' ,
13.9 0.60 0.322
-' ; - ;, - " : - , * '\\- , " -
15.0 0.84 0.403
Normalized deviation
Average (grand-avg) (known)
- , « <> ->'/,<',,,- "*. , -,* ;
14.17 -0.38 -0.58
'', i ,**' "%.- ; ' ""*\y '-**' -~T'"1~ ,','
" -- / -."' ' -!' ' ">* ..' ' ' s
.*"., / - ->
~- " - , , - " , ' -- ~ -, ^ /» , -,
; " ^ - t ** - - i
* * '> ' -.' "
13.97 -0.54 -0.73
_, ^,, ^ ^^V , , T- , -J)-^ ^ ,
, > , . ' ' >
14.57 -0.07 -0.26
\ ' --' : ' -'
Tag
-\ '# -,
$*'" ~i
'' ' -
* ; -
'£:U
;.,»""
",>,= ";
-' "*,
* -_
- >;';-
Data sorted by Laboratory Average
Average Tag
3.33 x
5.70 x
7.57 x
8.43 II.
10.03 11
10.23 II
10.57 II
11.00 II.
11.03 II
11.53
11.73
12.17
12.30
12.47
12.57
12.90
12.90
13.07
13.27
13.30
13.37
13.47
13.50
13.50
13.60
13.60
13.63
13.67
= No data submitted
0 = Insufficient data
Lab Average Tag
FZ 13.70
TL 13.70
QU 13.80
QT 13.83
UN 13.93
PV 13.97
JG 14.00
U 14.10
PQ 14.10
CK 14.13
TH 14.17
OF 14.20
ID 14.27
K 14.27
AU 14.27
SM 14.40
BO 14.43
CE 14.50
PG 14.53
RK 14.53
CA 14.53
AE 14.53
SF 14.57
FN 14.57
E 14.57
AL 14.67
TE 14.77
DT 14.80
TAG SYMBOLS
Lab Average Tag
AW 14.80
BH 14.80
SX 14.83
BA 14.83
L 14.87
W 14.90
BK 14.93
RZ 14.97
HL 15.00
LT 15.03
VI 15.03
QZ 15.10
UE 15.10
RV 15.20
OY 15.30
ER 15.37
RD 15.37
DZ 15.50
N 15.57
HK 15.57
AF 15.67
DB 15.70
X 15.73
SD 15.73
AJ 15.77
JS 15.80
ST 15.83
PB 15.83
1t = Above control
x = Determined to be an outlier U- s Below control
Lab
EL
A
T
EO
UP
UQ
GQ
QJ
SS
QY
J
HP
SZ
OX
NT
BC
AP
CG
DE
C
CJ
PW
RF
NO
EB
I
SI
BM
limit
limit
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
16/30
Radivtm-226
Average
Tag
Data sorted by Laboratory Average
Lab Average Tag Lab Average
Tag
Lab
15.93
16.07
16.07
16.20
16.30
16.40
16.73
UW
SO
M
BN
S
NH
n
16.83
16.87
16.87
16.90
17.17
17.20
17.43
18.27
AZ
sc
Q
QQ
AH
TQ
AK
P
18.30
19.13
20.50
20.53
21.67
22.37
25.33
25.37
ft-
tr
tr
X
X
X
X
JE
NJ
TS
TN
QX
TD
LR
VA
responding labs
Frequency distribution
-6
Normalized deviation of the mean from the known value
% responding labs
Frequency distribution
10-
-4-20 +2 +4
Normalized deviation of the mean from the grand average
= No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft s Above control limit
JJ s Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
17/30
Radium-228 Statistical Summary 194 Participants
The known value of this nuclide is 15.8 pCi/1 with an expected precision of 4.0; the control limits
are 8.9 to 22.7; the warning regions are 8.9 to 11.2 and 20.4 to 22.7
91 (46.9 %) Failed to respond ;
6(3.1 %) Outliers -
Statistic
6(5.8 %) More than 3 norm. S.D. .
. 87(44.8 %) Within all limits
Respondents
10(5.2 %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
15.48
3.91
15.29
25.26
-2.03
-0.08
15.60
-1.27
-0.05
Grand Avg 15.42
2.49
6.19
16.13
-2.38
-0.15
15.60
-1.27
-0.08
1O(9.7 %) Between 2 and 3 norm. S.D.'
66(64.1 %) Within 1 norm. S.D.
of known value
21 (2O.4 %) Between 1 and 2 norm. S.D.
-------
18/30
Radium-228
Lab Res. 1
A
AE
AF
AH
AI
AJ
AK
AL
AO
AP
AR
AD
AW
AZ
BA
BB
BC
BG
BH
BK
BL
BM
BN
BO
BS
BW
C
CA
CE
CG
CJ
CK
CM
CO
CP
CQ
CS
cx
D
DB
DD
DE
OG
DJ
DL
13.1
16.5
16.7
18.8
16.8
15.9
17.0
14.1
10.1
2.3
20.1
15.5
12.9
11.1
11.4
18.7
15.9
15.0
19.1
15.9
14.6
15.9
14.0
12.5
13.4
14.0
16.7
CRD-LV Performance Evaluation: Blind-A, 18- Apr- 1995
Res. 2
10.5
15.9
16.7
19.1
13.9
15.7
18.3
13.9
8.3
4.2
19.0
16.9
13.8
11.2
11.0
17.5
15.8
14.5
18.3
11.4
17.0
16.1
11.0
12.5
13.5
14.9
, -* \-
16.8
t '
Res. 3
11.3
15.9
17.1
16.3
16.5
15.3
19.3
13.4
12.3
2.0
18.3
16.8
11.6
11.4
10.6
17.0
15.7
16.6
17.8
12.0
14.5
15.3
14.0
13.8
15^6
14.5
16.8
= No data submitted
0 s
Insufficient
data
x =
Exper.
Sigma
1.33
0.35
0.23
1.54 .
1.59
0.31
1.15
0.36
2.00
1.19
0.91
0.78
1.11
;-
0.15
0.40
0.87
0.10
1.10
0.66
2.44
1.42
0.42
1.73
0.75
1.24
0.45
0.06
Rnganal
(R + SR) Average
0.384
0.089
0.059
0.413
0.428
0.089
0.340
0.103
0.591
,. -- "
0.325
0.266
0.207
0.325
.,
0.044
0.118
0.251
0.030
<
0.310
0.192
0.665
0.369
0.118
0.443
0.192
0.325
0.133
, '- ; ^ -," *
0.015
11.63
16.10
16.83
18.07
15.73
15.63
18.20
13.80
10.23
2.83
19.13
16.40
12.77
11.23
11.00
17.73
15.80
15.37
'
18.40
13.10
15.37
15.77
13.00
12.93
14.17
14.47
16.77
TAG SYMBOLS
Determined
to be an outlier
Normalized deviation
(grand-avg) (known) Tag
-1.64
0.29
0.61
1.14
0.13
0.09
1.20
-0.70
' * - \ ;.\" />
-2.25
' -&4S, ' '
1.61
0.42
-1.15
-1.81
-1.92
1.00
0.16
; v . v '
-0.02
\
1.29
-1.01
-0.02
0.15
-1.05
-1.08
*', , ._
" ' f J
-0.54
.':.W/': r
-0.41
>:,s '-, Y/ :^;-»
0.58
',-.'-. ^ " "''i '"'
' ;'', ^ ^ N , ~, '"" ^
IT = Above
U = Below
-1.80
0.13
0.45
0.98
-0.03
-0.07
1.04
-0.87
v' ;"*' ':;
-2.41 '
"" "-' V\S' , ' £'fi
-6.61 x
1.44
0.26
-1.31
, >: '.. ', , ;!
-1.98
* -
-2.08
0.84
0.00
- '*'/
-0.19
'-\'' ' . ' "
,; ; -^
1.13
-1.17
-0.19
-0.01
-1.21
-1.24
- > *''.-.
' " t v - 9 ^
-0.71
-0.58
: ';,v';\\'"»' '»
0.42
v^. ,s ^^^^ A V-VA-JS ^ % j
-'" , *:'' " -, ', .-,.
l'',"'" ' ''' - - ''*! "'
-*'... .
control limit
control limit
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
Radiiun-228
Lab Res. 1
DM
DO
DS
DT
DZ
E ':
EB
EL
EO
ER
EV
EX
' FF
FJ
FL
FN
FU
FZ
GE
Gl
GQ
GZ
m
HK
HL
HP
I
1C
ID
J
JE
JG
JN
JQ
JS
JY
K
KE
KT
KX
L
LF
LG
LL
=
0 =
- ; -_'-
15.1
15.7
,
15.8
15.9
17.9
,"; 'o ; r ;
-, :_
*
18.3
11.0
13.8
13.7
13.1
16.5
13.0
-. . \: ,
14.2
16.5
11.7
12.4
14.6
10.9
,.' ^\\(
16.1
Res. 2
"".'-* A-'.
16.0
15.3
'- \ ' ! Y
16.0
19.5
17.4
? , ,^ ^v~;
; -' ;
% . S i C" ^
18.1
7.6
' i ,'
,"v- *V -\'
12.7
14.0
13.1
15.4
14.9
-
16.8
15.6
14.2
12.2
" - , - \s S " "
16.2
1 \
11.9
.."" "" "" ^ '".' % ._
16.8
\.'. '£ /v.' ' -
-\/>/ ' ,'
" * '?'"*'> Y-l<
Res. 3
^
""w^V
15.5
15.8
16.7
17.0
17.0
_ -^ \\x\- >
,- ' - '
" \
18.4
'- ^ ,. X '-
14.0
,;.x , o
12.0
13.3
13.1
14.2
14.7
15.7
15.6
16.9
13.7
^ "^ * *" -"
V \
15.4
8.3
^; -- - \ '
16.5
"" i \ v \
> \" y
No data submitted
Insufficient
data
x. =
Exper.
Sigma
*'* 'VV-- *-.-
0.45
0.26
0.47
1.84
0.45
0.15
3.20
- * ";
0.91
0.35
0.01
1.15
1.04
1.31
0.52
2.60
0.81
0.80
1.86
0.35
Rnganal
(R + SR) Average
'. ,/s.T ' ' " ,->
0.133
0.074
v ^ ' % -rt.
0.133
0.532
0.133
^^-v\\- ^,-^ -
- r^1" -.^
, " - s* -, ^V^-
\
0.044
v- " :^3\-v;r^;
0.945
Y-s' '^J\'
,':\-> ^ '';'':- = "
0.266
0.103
0.000
0.340
0.281
0.384
0.133
0.768
0.222
0.236
0.532
,5-V-y; ~- ;:}'-
0.103
'' ' , -;f r";f
' -S-x ^'- "V\
- ' *'"i\
"V ,V *,V*
"x - ,v
15.53
15.60
v- " "*
16.17
17.47
17.43
t , : !,\
\ "" -^ '
-. ^
^ ^ """^ "" s ;^
^i/--
18.27
^;"y?,~-
10.87
-^'!»",\!^
.-" 0-":,,
12-83
13.67
13.10
15.37
14.20
15.57
15.90
14.27
12.77
\ x - -
15.40
10.37
s^s -.'' N f
;^X*
16^47
^ -.'" r*' 'v
: ^:o\
? \s % ""^ 1
TAG SYMBOLS
Determined
to be an outlier
19/30
Normalized deviation
(grand-avg) (known) Tag
^ \ - - > c - s,
t:\ -" "'*w\ ,-;*>
\" * «^ X ^'^'^ %^\ - ^ "s«^v
*^-v v' * N-. "^x-*V^ - N f'x
0.05
0.08
*\ - rs ", *'
0.32
0.88
0.87
'I"
>N- \ -' , - -
;,-> ,-'' -V'C- ' -N' -- --
-Hl-*^ .1 ; ," ~\"-\\'
V^T^V^... """-.Y
__ JL.23
^ Av^f;'-.; ;", v,~ "v,v
-1.97
^^>>-'- :^ '-;
^'v.'-' ".o'-.-s-'^ ^ '-'--
-1.12
-. v "". ^
-0.76
-1.01
-0.02
-0.53
0.06
0.21
-0.50
-1.15
\\NV* "^l^ ""s-s ^X * ss ?^vX
" -"." V ' v "- 1
sv * ^ ^ "". ^v ."
K-:»/O> ;;>* ' -T^
-0.01
, _;2.19_ .^
?/^ :-:-"- ";X\;;^
?-Vf.^-^;:!^V- ';'!
0.45
-,*s" .. '. '' '!'
^||C '' ' * V-
^,\"-~' ,;://' , "
ft = Above
U s Below
V;.:^;---%'V:<>
V ^"x^ -^ -^*-
-0.12
-0.09
>. " \
0.16
0.72
0.71
;-\^y< r'-^*'^'
1 ^-~\; ,\\r»^->;
\;»V
-% ;'^VtC-.« Y
'^: ^
E;"^^<«^
-2.14
fSSTSJf
^l&-'4:;-*V
-1.28
^-V'v'" *^"
- . ,v ' ->--»'v
-0.92
-1.17
-0.19
-0.69
^
-0.10
0.04
-0.66
-1.31___
"" ^ % % %s -^ '^'\ \
"?^\\ >:'^*T.
-0.17
^-2.35_\_v
^ J^;^H,;-^I;-
\,;,\^:;\"«', ^ ^v"
0.29
;:.vJT; V;\»"'*
^ - s'"'" ' » -
«,' - '''. ; 3 '
control limit
control limit
-------
20/30
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
Radium-228
Lab
LR
LT
M
MA
MF
MP
MQ
MV
MY
N
NA
NH
NI
NJ
NK
NO
NT
O
OF
OS
OX
OY
OZ
P
PA
PB
PG
PI
PM
PQ
PB
PV
PW
Q
QC
QJ
QP
QQ
QT
QU
QW
QX
QY
QZ
RD
. =
0 =
Res. 1
20,0
18.7
17.9
16.9
16.3
15.0
12.2
15.3
11.0
15.7
15.0
16.4
15.1
T
19.2
18.0
16.3
19.6
16.1
13.3
7,7
27.8
13.8
14.0
Res. 2
27.0
19.5
16.1
16.8
17.7
19.0
14.1
15.6
9.4
15.9
13.0
16.8
15.6
14.3
'
16.3
16.0
21.6
20.0
13.1
4.9
26.4
15.2
13.9
Res. 3
26.0
24.5
17.1
'
16.0
15.8
17.0
16.2
15.9
10.4
15.9
14.5
16.2
15.8
18.1
12.2
16.5
20.6
16.0
12.4
6.3
24.0
14.9
10.3
No data submitted
Insufficient
data
X 5
Exper.
Sigma
3;79
3.14
0.90
0.49
0.98
2.00
2.00
0.30
0.81
0.12
1.04
0.31
0.36
2.57
2.98
0.25
1.00
2.28
0.47
1.51
1,92
0.74
2.11
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
1.064
0.856
0.266
0.133
0.281
0.591
0.591
0.089
0.236
0.030
0.295
0.089
0.103
0.724
0.856
0.074
0.295
0.591
0.133
0.413
0.561
0.207
0.546
24.33
20.90
17.03
\,
: . - -,.
16.57
16.60
17.00
14.17
15.60
10.27
15.83
14.17
16.47
15.50
17.20
15.50
16.27
20.60
17.37
12.93
5J7
26,07
14.63
12.73
TAG SYMBOLS
Determined
to be an
outlier
3,86 'i
2.37
0.70
-" " '*" * " " ' ^ ' '
"' v ' "
% v i M"1 " ,
..'' ' *«. "* j i~
'., ',
0.49
0.51
0.68
-0.54
0.08
-2.23
0*18
-0.54
1
0.45
0.03
0.77
0.03
0.36
2.24
0.84
-1.08
: >4slQ V.
4,61
-0.34
-1.17
ft = Above
U = Below
,3*70 k
2.21
0.53
;f~\ -"'^ > v
**'*,.
;.;- ^'/'' *-*'
-\ / ''»; ,
' " ' J <* '
' ' ,.
0.33
'*,
0.35
»}
0.52
*
-0.71
-0.09
' ' *\
-2.40
, , / ' ' »-, :
0.01
-0.71
0.29
*
-0.13
* -
_
* -
0.61
-0.13
0.20
2.08
' , *--
0.68
, , *
-1.24
-4.26 x
*..
4.45 X
1 ,- '
-0.51
-1.33
control limit
control limit
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
Radium-228
Lab Res. 1
RE
RF
RG
RJ
RK
HP
RR
RV
RZ
S
sc
SD
SF
!._si
SM
SO
SR
ss
ST
sx
sz
T
TD
TE
TH
TI
TL
TN
TQ
TS
TY
U
UA
UE
UG
UK
UN
UP
UQ
UW
UY
VA
VC
', ' v " .' -
16.2
35.4
" , ' '
16.9
18.2
16.1
14.4
15.6
18.5
" -. rt £t \
-. >: -
* ' .-V :--'-,
16.7
14.4
14.0
8.9
16.6
14.8
14.9
16.9
14.8
13.6
13.7
19.1
14.1
11.4
14.5
15.7
17.6
14.6
16.8
- YX VY\
23.1
"'""xT J" X ' \
Res. 3
~:- -.' -
18.1
";":' ,0*
36,1 \
" \ '^.
17.5
15.6
14.5
13.7
12.2
19.0
21.0
;
15.8
14.1
13.4
9.7
18.0
14.3
16.2
17.2
10.3
17.9
12.5
16.5
17.0
14.7
16.1
13.7
22.6
13.2
15.5
19.2
= No data submitted
0 =
Insufficient
data
x =
Exper.
Sigma
1.13
,
1.01
1.25
1.59
0.85
0.51
1.84
0.25
2.26
%
x \ _ ~
1.16
0.40
3.07
0.80
1.11
2.58
1.01
0.68
2.29
2.78
0.96
1.32
1.51
2.29
1.50
2.05
2.52
0.78
1.15
1.97
Rnganal
(R + SR) Average
<' xx {-
0.295
"\?x '--
0^96
' -;
0.354
0.428
0.236
0.148
0.502
0.074
6.384
0.605
.x^;,
. r -
0.340
0.118
0.827
0.236
0.325
0.694
0.295
0.192
0.665
0.768
0.281
0.384
0.428
0.650
0.443
0.605
0.738
0.207
0.340
0.576
y\" .
V "\ X -Vx',1 ', «
16.80
;.^\;;T*^:-
^ v ^ ^trv'tOfTt >"
* N K h \fQ+JUV ^X"1
>"- - , '" " +^-w
16.50
16.37
15.13
13.83
14.30
18.73
X s' ' . \
19.50
xx'V-; \ v\-:
\- - \ \,~^- ' '-,!^'
16.87
14.47
15.47
8.90
16.80
16.03
16.00
16.67
12.30
14.73
13.53
17.93
15.80
12.13
16.03
\
15.73
19.90
14.10
15.60
~,\ - ; V »V
21.30
\^,rv T-':^
TAG SYMBOLS
Determined
to be an
outlier
21/30 1
Normalized deviation
(grand-avg) (known) Tag
tV'"''5 ' '.-" '" V x>
0.60
9f}'xf;';:-;;;^;v
fV 8.5e / -;;:;
^ ,,;t!{/V\^
0.47
0.41
-0.13
-0.69
-0.49
_ ,,l;43is ^^
-^;?\
,1.76_
'5v N . * . ^^ % i
* ^"^ "
0.62
-0.41
0.02
-2.82
0.60
0.26
0.25
0.54
-1.35
-0.30
-0.82
1.09
0.16
-1.42
* "" ~~
0.26
0.13
1.94
-0.57
0.08
'?*, ' ,* '^V; , , ^J^
2.54
X ' ^ ^ A ^ s°^xXy ^ v
Tt = Above
& s Below
:> »»>-*%,-.
q!43
AV ^ i\\ «'?"'''' °v^^^ %1- '
^ " \ '\ T ^ ""
^^40"?;;^
\x'>"x\ ^:V.:
0.30
0.25
-0.29
-0.85
-0.65
1.27
jA6o__LL
Al'^.\'. ;* '-..
>'XJ,^'1\.;»~ >
0.46
-0.58
-0.14
-2.99
0.43
0.10
0.09
0.38
-1.52
-0.46
-0.98
0.92
0.00
-L59
' X -<, % S ' , x ' '
0.10
\ s % < ^vv
- ^ -1" ', ' »x , X
-0.03
1.78
-0.74
-0.09
^H; ;;-;" rv ",;;;
2.38
vicx^xT^;'.--
control limit
control limit }
-------
22/30 CRD-LV Performance Evaluation: Blind- A, 18-Apr-1995
Radium-228
Lab Res. 1 Res. 2
VG 13.1 13.6
VI 15.7 18.6
vj; :" - \ / '- ' - -
VM
VN
vo
VQ -, -.- - . .
VT -'>; ' ',
vu ' :'?V - :
W 12.3 14.6
WF / : ."/' - - '
X 18.7 23.0
Z
Exper. Rng anal
Res. 3 Sigma (R + SR)
13.6 0.29 0.074
17.4 1.46 0.428
- , , , ,>
, '
1 V1" '
- , *"
13.6 1-15 0.340
r ,'--''
25.2 3.31 0.960
Normalized deviation
Average (grand-avg) (known)
13.43 -0.86 -1.02
17.23 0.78 0.62
'* '* ' * .. ^ * f ' "" V ' ' * v
'" ~\>'' ~ V,'
''.', ' '" ,- '-'.'-
- '' , '* , ''",",**
' - * ' '',",''-'' s -
,,.,, !, - ^ .. ,-,^ ,_;,,,. ^,// _ ',,,-
- ' - , . ' ' ' -! ---'"- ' -' " - '' .-'-",
13.50 -0.83 -1.00
, \ " f s '^'\ ' " '"' \"' '' '' '"' '' '"' *'"''*
22.30 2.98 2.81
-J\ :- '.-- ,'
x
Tag
;-:» r
'- ''-'',
*
: ,-{*'? ,
\"rj
f?»;\V
' -^ffc
^»; :^
-'-.
Data sorted by Laboratory Average
Average Tag
2.83 x
3.87 x
5.97 x
8.90
10.23
10.27
10.37
10.87
11.00
11.23
11.63
12.13
12.30
12.73
12.77
12.77
12.83
12.93
12.93
13.00
13.10
13.10
13.43
13.50
13.53
13.67
13.80
13.83
= No data submitted
0 = Insufficient data
Lab Average Tag
AU 14.10
SI 14.17
QU 14.17
SZ 14.17
AP 14.20
OF 14.27
K 14.30
FZ 14.47
BH 14.47
BC 14.63
A 14.73
U 15.13
TI 15.37
RD 15.37
JG 15.37
BA 15.40
GQ 15.47
QT 15.50
CK 15.50
CJ 15.53
CA 15.57
HL 15.60
VG 15.60
W 15.60
TN 15.63
HK 15.73
AL 15.73
SC 15.77
TAG SYMBOLS
Lab Average Tag
UQ 15.80
OY 15.80
NO 15.83
CS 15.90
I 16.00
JE 16.03
SD 16.03
ST 16.10
DB 16.17
QZ 16.27
TL 16.37
S 16.40
HP 16.47
CE 16.47
BO 16.50
JS 16.57
SX 16.60
PV 16.67
PB 16.77
DT 16.80
ID 16.80
UW 16.83
NT 16.87
DZ 17.00
AJ 17.03
UN 17.20
AI 17.23
CG 17.37
It = Above control
x = Determined to be an outlier JJ s Below control
Lab
TS
BM
OX
J
TE
UE
TD
AE
EB
PW
RZ
AZ
P
L
RV
N
NH
TH
DE
T
RF
AF
SS
NJ
M
PQ
VI
QJ
limit
limit
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
23/30
Radium-228
Average
Tag
Data sorted by Laboratory Average
Lab | Average Tag Lab | Average
Tag
Lab
17.43
17.47
17.73
17.93
18.07
18.20
EO
EL
BK
TQ
AH
AK
18.27
18.40
18.73
19.13
19.50
19.90
FN
C
SF
AW
SM
UP
20.60
20.90
21.30
22.30
24.33
26.07
35.20
x
x
X
Q
LT
VA
X
LR
QX
RK
responding labs
Frequency distribution
-6
-4 -2 0 +2
NormaUzed deviation of the mean from the known value
% responding labs
Frequency distribution
10
-6
-4-20 +2 +4
Normalized deviation of the mean from the grand average
s No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft = Above control limit
!! s Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
24/30
Uranium (Natural) Statistical Summary 194 Participants
The known value of this nuclide is 10.0 pCi/1 with an expected precision of 3.0; the control limits
are 4.8 to 15.2; the warning regions are 4.8 to 6.5 and 13.5 to 15.2
80(41.2 %) Failed to respond .
4(2.1 %) Outliers'
Statistic
108(55.7 %) Within all limits
Respondents
2(1 -O %) In warning zone
but within control
Non-outliers
Mean
Std. Dev.
Variance
% Coef. of Var.
% deviation of mean from known value
Norm. dev. of mean from known value
Median
% deviation of median from known value
Norm. dev. of median from known value
10.30
2.43
5.88
23.56
2.96
0.12
9.90
-1.00
-0.04
Grand Avg 9.93
1.07
1.15
10.81
-0.72
-0.07
9.87
-1.33
-0.12
4(3.5 %) More than 3 norm. S.D. «
2(1.8 %) Between 2 and 3 norm. S.D.
. 1OO(87.7 %) Within 1 norm. S.D.
of known value
8(7.O %) Between 1 and 2 norm. S.D.
-------
25/30
CRD-LV Performance Evaluation: Blind- A, 18- Apr- 1995
Uranium (Natural)
Lab Res. 1 Res. 2
A
AE
AF
AH
AI
AJ
AK
AL
AO
AP
AR
AU
AW
AZ
BA
BB
BC
BG
BH
BK
BL
BM
BN
BO
BS
BW
C
CA
CE
CG
CJ
CK
CM
CO
CP
CQ
CS
CX
D
DB
DD
DE
DG
DJ
DL
=
0 =
10.8
11.2
9.8
9.0
10.4
11.2
10.2
11.4
8.3
9.5
10.7
9.7
7.5
9.6
10.1
9.4
-;
10.9
8.7
8.6
10.3
9.9
9.8
10.5
10.0
9.3
9.6
10.7
11.4
9.9
''."
9.4
10.6
11.4
9.2
9.4
8.8
11.6
10.8
11.6
7.9
10.0
10.6
9.2
8.0
9.6
9.4
9.4
10.3
9.9
8.9
9.6
8.9
10.0
11.0
10.0
9.6
10.0
10.2
11.4
12.4
9.4
Res. 3
10.2
11.5
10.2
9.4
8.7
10.7
10.9
11.7
8.1
10.6
10.4
8.7
9.3
9.6
10.3
10.0
11.0
10.7
9.2
8.9
9.8
9.8
11.9
11.0
10.3
9.7
10.3
11.8
11.6
9.5
No data submitted
Insufficient
data
x =
Exper.
Sigma
0.31
0.15
0.50
0.23
0.95
0.45
0.38
0.15
0.20
0.55
0.15
0.50
0.93
0.00
0.47
0.35
0.38
1.01
0.30
0.70
0.55
0.12
0.71
0.58
0.51
0.21
<,
0.26
0.23
1.28
0.06
Rnganal
(R + SR) Average
0.118
0.059
0.197
0.079
0.335
0.177
. 0.138
0.059
0.079
0.217
0.059
0.197
0.354
0.000
0.177
0.118
0.138
0.394
0.118
0.276
0.197
0.039
0.276
0.197
0.197
0.079
0.098
0.079
0.492
0.020
10.53
11.37
9.73
9.27
9.30
11.17
10.63
11.57
8.10
10.03
10.57
9.20
8.27
9.60
9.93
9.60
10.73
9.77
8.90
9.60
9.53
9.87
11.13
10.33
9.73
9.77
10.40
11.53
11.30
9.43
TAG SYMBOLS
Determined
to be an
outlier
Normalized deviation
(grand-avg) (known) Tag
0.35
0.83
-0.11
0.31
0.79
-0.15
-0.38 -0.42
-0.36
0.72
0.41
'V, '- * -~' '-' '-'
0.95
-1.06
0.06
0.37
-0.42
-0.96
-0.19
-.'
0.00
-0.19
0.47
-0.09
-0.59
-0.19
-0.23
-0.04
0.70
0.23
-0.11
-0.09
0.27
0.93
0.79
,-' !
-0.29
,'. x':~ ''V.'V *'*
It & Above
U = Below
-0.40
0.67
0.37
,." - > ,* /*>',"
0.90
-1.10
<, '.' \ - *
0.02
0.33
-0.46
-1.00
-0.23
',-/ '
-0.04
-0.23
sV
0.42
-0.13
-0.64
x - -* -
',''' ' *"
-0.23
-0.27
-0.08
0.65
0.19
-0.15
-0.13
' , * ' '
,'- > * . -*.< I
0.23
0.89
"' " ' '*' ', fjvff
0.75
xvV\ ,;|V;,,
-0.33
/ * * '"' -
control limit
control limit
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
Uranium (Natural)
Lab Res. 1 Res. 2 Res. 3
DM
DO
DS'"
DT
DZ
E
EB
EL
EO
ER
EV
EX
: FF
FJ
.:'FL '
FN
'FU.'
FZ
GE
GI
GQ
GT
GZ
m
HK
HL
HP
I
1C
ID
J
JE
JG
JN
JQ
JS
JY
K
KE
KT
KX
L
LF
LG
LL
[;:
<<-, ;-\v,*
10.0
^., <--7^;
9.7
10.1
8.8
10.5
9.0
" , - > ' o--"':
9.3
*OY
*%
8.8
5 ^-^ - ,
9.6
V> "
12.0
$ \
. "" v >. ' ._ \ "'i.
9.3
.cV - ^
" ^ " ^ i
9.4
8.1
10.4
12.4
12.0
10.4
9.8
> -*" %
>/
9.8
' v* "T£:
_rlU;r:
10.0
\, \ - \°* ^ *~
11.3
- . -.-'^\
*
' " T" *;'""
- , ^ - - ,
9.7
" 0 ^y*"*
9.5
11.2
8.7
10.9
10.0
"v-'^^'^T1- "~x
9^4
- \,i '"' v .-
;>-> -.
8.4
* " 0>' *
9.9
, ' - " .
9.7
\ "" - ^^
-V . "' v- ..
10.1
^ " "''''" " % ^'I
o %* ^ * ""- -"^-\'1
^ ^ ,. "
9.1
8.1
10.4
11.9
10.6
10.0
9.8
, !*' - * ' -
-. ,'\ ,! *,
'^ *" ^ >. "^ ^
10.0
0V ' ^ ^_.,xs ^ ^
11.7
^v-oVV1 \- ;"
11.0
^';^""V^'-^;'^
10.6
, *-*& » -*"v ",'-
No data submitted
Insufficient data
10.0
^ " "''
9.2
11.4
8.7
11.1
10.6
9.5
8.8
9.9
10.0
9.3
\~-
^\f\v
9.8
8.1
10.1
12.9
9.4
10.1
10.4
";%
1. '- \' X
9.8
10.9
f i1"
13.0
v ^\ -.
11.4
,s; "/ 'j;
';, >'
'- y
X
Exper. Rng anal
Sigma (R + SR) Average
0.17
. \ v . *
0.25
0.70
0.06
0.31
0.81
o \-' V ' A/- ' -
0.10
\v
0.23
<
0.17
1.25
0.46
- ~: ' - ' -
0.35
0.00
0.17
0.50
1.30
0.21
0.35
0.12
0.42
1.53
" " s
0.44
0.059
- \
0.098
0.256
0.020
0.118
0.315
-\ -,
0.039
0.079
0.059
0.453
0.158
, '" - ,
0.138
0.000
0.059
0.197
0.512
0.079
0.118
0.039
0.158
'*
0.591
o "" "
0.158
,,-// ;
^
TAG SYMBOLS
= Determined to be an
9.90
- : , -*'>, "A?
-. " - iv
9.47
10.90
8.73
10.83
9.87
->'^,:^-V;?:*
9.40
"" "" s -. "o - %\" " "'".^V
" \
1 * ,
8.67
v ^ ^ ^OX
9.80
S,S.",'' >'"" v '-1'
10.57
'" ^-. « A \ % % % ^
' -' o">t <
9.57
- - vVv-»: \'.--Y;V
\ ' ^.\-\>Vl;w
> > T"" ''"' N v " '"'">''' >
9.43
8.10
10.30
12.40
*
10.67
10.17
10.00
" \ \« v""' *
' ' , ' - ~ -
=x ;---^ --: " \,^
9.87
'-" /;-,>'; ^;Nl
11.23
'' -^^/'-V":
11.33
"v ^ ^ s ^T^1"" ^ x?^ \
11.10
;v *, y;:'-^T .<-'
-' ' v " ^ *V ' '
outlier
26/30
Normalized deviation
(grand-avg) (known) Tag
h%v "" V ^ s<" "" ^
-0.02
^"f \^;^7^x/;
-0.27
0.56
-0.69
0.52
-0.04
\,">YK'H -JV
-0.30
,.-'7-\'\ v>~ ';f
'-* "\ ' - *
* *
-0.73
-0.07
; - ^ , ~; ; '!r : '
0.37
^J.-mT >^
"-. _ \>v -->
-0.21
^ s " """ ""s * " -^
- f %"s\ 1 ^ - - **
-\\'T";^^ Sj
-0.29
-1.06
0.22
1.43
0.43
0.14
0.04
;^c,':" ~V;Y' ,';;
V :" - ,; >"°' (V"
" '' ' V * i,\\ \ v\
-0.04
'X,'-''1- ^ " \ \ N X"-\
^0.75
0.81
v?>J"x^""->\':i
0.68
fvl-";'^' f:"
- -!'/ -; ^v-/s " .
'' x" ' . ' '.' 'V-
tl = Above
U = Below
^'::r:;;i;P»^\
-0.06
^!v?^C-it;;
-0.31
0.52
-0.73
0.48
-0.08
iOfgMt^»!vX
-0.35
iv%\xx\«J5
!-:>\: \vV-\-
,;"r\ -';" ,»?-
-0.77
^.cf^r'^vr
_-0.12^
^^v?"->;|:\
0.33
^W>;;-Jr^r
^xV-v^;-* - -
"-0.25
K^-x ""'^^#:
x»X'v"U«rNV
^:iA;r::-»^\
-0.33
-1.10
0.17
1.39
' ^
0.38
0.10
0.00
^^irt^r^'
'-?''"';; Vv\-i \\v ''"' x"
\:4$;^^^*X^
-0.08
^7;::;^^*^;
^0.71__
0^77
^^^^"'^
0.64
|r^f^V}{
;/;^v-?r "-'
":'"':: ::::^' »; c
control limit
control limit
-------
27 /
30
CRD-LV Performance Evaluation: Blind-A, 18- Apr- 1995
Uranium (Natural)
Lab
LR
LT
'M "'
MA
MT
MP
MQ
MV
MY
N
NA
NH
NI
NJ
NK
NO
NT
0
OF
OS
OX
OY
OZ
P
PA
PB
PG
PI
PM
PQ
PB
PV
PW
Q
QC
QJ
QP
Q9
QU
QW
QX
QY
QZ
RD
Res. 1
, - ,;,,,,, , \ ~'
10.0
; y-;-, , /-
"" '' ' ' '
-,,;',,
_,' t '
9.2
9.8
10.5
10.2
10.2
9.9
8.7
f " \
8.4
8.9
20.8
-" i&g
:, *',
10.1
12.1
' ,
10.1
, > '
9.8
29.6
11.7
«
10.0
s ^
10.5
6.2
4.5
10.2
10.5
9.2
Res. 2
; - - .
11.2
*' ' "" ' -.* '
" f- ' '"" '- '
_ , \ -- <
, x ^ ' .. ,
% ' ' "-,
,'-. ' " t
9.6
10.1
10.3
/ ';,
10.4
9.7
10.0
10.8
- .
8.4
9.1
21.2
; /-17.6-"
9.9
12.7
10.3
9.9
30.8
10.5
10.0
10.8
6.2
4.5
9.9
10.7
9.2
Res. 3
11.5
- ''
--; J-' - I
'"'"'' ' '>
8.9
8.8
10.6
10.6
9.1
10.1
12.8
-. , - _ ;
8.7
9.2
21.0
x'' "'-15.3"
9.7
10.8
' v s
9.7
10.0
27,0
12.3
-,
8.0
9.6
6.7
6.1
9.7
9.6
9.2
s No data submitted
0 =
Insufficient
data
X 3
Exper.
Sigma
0.79
"' ': /- ".-, -.
^
v,1"
x,;, ;.; ^"'
0.35
0.68
0.15
0.20
0.55
0.10
2.05
. 0.17
0.15
- P'20
: ' ~ 'i:46' -
0.20
0.97
' -. "
0.31
0.10
1.90
0.92
1.15
0.62
0.29
>*
0.92
0.25
0.59
0.00
Rng anal
(R -I- SR)
0.295
0.138
0.256
0.059
0.079
0.217
0.039
0.807
0.059
- - ,
0.059
0.079
; 0.532
0.079
0.374
0.118
0.039
- 0.748
0.354
0.394
0.236
0.098
0.315
0.098
0.217
0.000
Normalized deviation
Average
10.90
, ,
% ' , \
- ' ', , /'
; --,", ; - ,/.
9.23
9.57
10.47
-
10.40
9.67
10.00
10.77
' ' i l
8.50
9.07
21.00
15,93
9.90
11.87
' '' s
10.03
9.90
28.93
11.50
..,, < \,
9.33
10.30
6.37
5.03
9.93
10.27
9.20
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known) Tag
0.56
' """ '"* ' k" v *
1-- Vv^ :-,^^f
^ " ' '""* s "" i ^^
'', -v>' '^""-' ''i'
\V.'-:V,.V. V:'4c:<
' \X ><*'' !?"' ''
-0.40
-0.21
0.31
, - - ' >
0.27
-0.15
0.04
0.48
>, ^ ' '
'.:'*- '"-/- ' -'--"-' '
-0.82
, V --- ' '' / - =
-0.50
/ '-",6.39;;'- , :
'': '" 3AT -
-0.02
1.12
0.06
-0.02
10.97 ; .
0.91
- -,-
-0.34
0.22
-2.06
'.,' - *','
-2.83
0.00
0.20
-0.42
It s Above
11 3 Below
.-,' - : '>"-' -
0.52
^"T?' /,»,';
-0.38
' ' * - ,
0.17
-2.10
- ;' ,* --- » .-"
-2.87
-0.04
0.15
-0.46
control limit
control limit
-------
CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
Uranium (Natural)
Lab Res. 1 Res. 2
: RE
RF
RG
RJ-
RK
RP
RR
RV
RZ
S
sc
SD
SF
SI
SL
SM
SN
SO
SR
ss
ST
SX
sz
T
TD
TE
TH
TI
TL
TN
TQ
TS
TY
U
UA
UE
UG
UK
UN
UP
UQ
UW
UY
VA
vc
'" '*> \\*' ^
7^8
10.3
\ ,_ ^ ^
9.4
10.0
10.1
10.2
9.0
9.0
10.4
9.8
8.8
9.5
10.8
11.0
10.0
^
9.1
9.2
11.0
10.2
11.6
9.0
10.0
9.9
9.2
8.9
9.4
8.8
9.8
10.1
s .. y..
^ , ^
9.3
10.9
..
12.8
NS * "
7.7
10.1
;.v\.^'f-x
10.5
9.7
10.4
10.1
9.0
8.9
9.7
9.8
8.8
9.6
14.0
10.7
^ \\ . -. J ' ,_ «"" ""
9.5
-
9.8
9.5
10.0
9.0
8.9
11.8
10.3
9.2
9.7
9.1
-
9.3
8.6
x> >\X."-V
10.1
s,' °- ""; ;->
9.7
^>S^-(VJ
'"X-^ "xxV^
9.6
10.0
* \
^
17.3
N>
Res. 3
,
9.2
10.1
*;X'o "'»
9.4
9.7
10.1
10.0
9.2
9.3
10.0
9.6
8.8
9.7
12.1
11.3
.., , , ^, _
9.4
9.6
10.0
13.0
9.1
11.1
9.0
10.1
9.8
9.6
9.1
9.2
9.0
**', v '
10.1
. ^ , " ""
9.3
r*;,\.% '
- ;°" ,~ ,' ^
9.5
9.8
17.4
<
= No data submitted
0 3
Insufficient
data
x. =
Exper.
Sigma
>,-'-,» 'V :'*''"'
0.84
0.12
- < :
0.64
0.17
0.17
0.10
0.12
0.21
0.35
0.12
0.00
0.10
1.61
0.30
-'^\ -,\«S^
0.217
0.059
0.059
0.039
0.039
0.079
0.138
0.039
0.000
0.039
0.630
0.118
0.118
v ' ""
0.138
0.158
0.591
0.236
0.532
0.551
0.059
0.138
0.098
0.039
0.039
0.079
" * ^l
1 0.059
0.158
-"\ "' " A '-
0.059
0.217
,
0.906
N
"- ' % ""v*"* "" "'"''''> "f.
8.23
10.17
1 \^-\C ^:^S₯
9.77
9.80
10.20
10.10
9.07
9.07
10.03
9.73
8.80
9.60
12.30
11.00
V"; ^;>;^x^r"
9.63
.;'. ;\--:t^;^^y;
9.50
9.57
11.33
9.43
10.53
9.93
10.13
9.63
9.50
9.03
v
9.30
8.80
. ' v'" ,l ; ^!V-/
10.00
, ., x - ' ;, V' ' ? ^o-"
9.70
,/ - -; -' '-- "*-
' * f ^ ''- ^^^^ %^ ^ "" ^ -. l v
9.47
10.23
-
^ s° '
,15.83
- , * ^
TAG SYMBOLS
Determined
to be an
outlier
* N
-0.98
0.14
;^^fT>!£
-0.09
-0.07
0.16
0.10
-0.50
-0.50
0.06
-0.11
-0.65
-0.19
1.37
0.62
;?'»;7-'v:^?
-0.17
s;\, - ^ V',- ^-^\,,
-0.25
-0.21
0.81
-0.29
0.35
0.00
0.12
-0.17
-0.25
-0.52
s ^
-0.36
-0.65
,\v- ^-'- VN>
0.04
"t" /"';?'" -'"
-0.13
^;V^;f\ :';V
>- K- - t, ;, >' ^;-
-0.27
0.18
^
^ \\ s -"
^aUi^o
v(: x "'
It = Above
& s Below
^- ^ -%«i-
-1.02
0.10
;^P^St
-0.13
-0.12
0.12
0.06
-0.54
-0.54
0.02
-0.15
-0.69
-0.23
1.33
0.58
^i|^2^«'|;;
-0.21
^^5K::;r"vii£
-0.29
-0.25
0.77
-0.33
0.31
-0.04
0.08
-0.21
-0.29
-0.56
v - * ^ ;»
-0.40
-q.69^_^^iv
0.00
,;" vir;rf^;;;
-0.17
SST^SBv
-'x5'>^*^v
-0.31
0.13
_, -
<\v,Cl-v?r"
<^5\ 'Vi'V
3.3,7 ^'x /
<""
control limit
control limit
-------
29/30 CRD-LV Performance Evaluation: Blind-A, 18-Apr-1995
Uranium (Natural)
Lab Res. 1 Res. 2
VG 10.5 10.9
VI 13.5 13.4
VJ , - ' V *** "'' ' '>'
,"''''" f 5 \ * ^ V ' " ^
VM' ' '." - '-
- W . ' ' ' ' ; ", V *-'
VO 9,6 9.7
*r(\ ' ' , < -- '"'/''"
*^ *,
VT ,- ,, . ;.", - /
vu- - V-V :--'" ;- :'
W 9.5 9.8
WE , / '. %";. " "\
, WF* ' ' '-, '"- '-' "'-- -'-%;
X 9.5 11.0
. , -
Exper. Rng anal
Res. 3 Sigma (R + SR)
10.4 0.26 0.098
12.9 0.32 0.118
''',- ' ' ' '- '- '
- - " - ,.' ~ "'
9.7 0.06 0.020
% , ^ ^ , l A ., -
\ '; x - - . -
9.4 0.21 0.079
' -; - ', - ,
9.3 0.93 0.335
'''"' f J ~~
Normalized deviation
Average (grand-avg) (known)
10.60 0.39 0.35
13.27 1.93 1.89
.-'* " -^\-'-' *'* >'' ""'' ', ^' ,;
-^ '< ^X s ^\\ "X^ ''**,* ^''-; ^<*<< ? ^^^X'^^--^
^ - ;! - ;- x ^ - ' .- ^
"' ~, ' - "; ' " 'V, \*-'\;\:^ :',"*]' \y~
9.67 -0.15 ,,,-0.19
; ^ , ;\- ,', , '-- \', ,- -> , ->-»v^ f*}",?\-
i' " ; ,'' ' ' ^ '«','' i'»
' ' , , :' sS** C-' i*:,'\ " - *'\- -
' / ' ,,-, '., /-", ' ,/ - ''
9.57 :0.21 -0.25
^ ' ., -.f -. ^
.,-" - ; \ '' ''**,** " '* ' H V\' !-"
9.93 0.00 -0.04
- ' - ^ ,', - t , ,-',!,-,
Tag
' ^-'#yX
ff\t *s £' ^v
,Jk^.->
V'"' ,- , * l>
{ "<
l9^h:
*>*'
*'\ , *"' ;' "
. *
V . "*
- *"''
' <-»: > ,
Data sorted by Laboratory Average
Average Tag
5.03
6.37
8.10
8.10
8.23
8.27
8.50
8.67
8.73
8.80
8.80
8.90
9.03
9.07
9.07
9.07
9.20
9.20
9.23
9.27
9.30
9.30
9.33
9.40
9.43
9.43
9.43
9.47
= No data submitted
0 3 Insufficient data
Lab Average Tag
QX 9.47
QU 9.50
HL 9.50
AR 9.53
RF 9.57
BB 9.57
OS 9.57
FJ 9.57
E 9.60
TS 9.60
SF 9.60
BO 9.60
TL 9.63
S 9.63
RZ 9.67
OY 9.67
RD 9.70
BA 9.73
N 9.73
AH 9.73
TQ 9.77
AJ 9.77
QJ 9.77
ER 9.80
SZ 9.80
HK 9.87
DE 9.87
DT 9.87
TAG SYMBOLS
Lab Average Tag
UN 9.90
TI 9.90
SS 9.90
CA 9.93
W 9.93
ST 9.93
NA 9.93
GQ 10.00
BK 10.00
SI 10.00
C 10.03
BC 10.03
TH 10.03
SO 10.10
VO 10.13
NK 10.17
UE 10.17
SD 10.20
CK 10.23
AF 10.27
RK 10.30
BN 10.30
CM 10.33
RP 10.40
FN 10.40
JS 10.47
EL 10.53
CE 10.53
It = Above control
x = Determined to be an outlier li = Below control
Lab
PV
PB
DO
X
TD
QY
BH
NO
JE
U
SC
PQ
AW
RV
TE
RG
J
RR
UP
QZ
QQ
HP
CJ
NJ
CS
NH
T
A
limit
limit
-------
CRD-LV Performance Evaluation: Blind-A, 18- Apr- 1995 30/30
Uranium (Natural)
Data sorted by Laboratory Average
Average Tag Lab Average Tag Lab Average Tag Lab
10.57 FZ 11.00
10.57 AZ 11.10
10.60 VG 11.13
10.63 AL 11.17
10.67 ID 11.23
10.73 BM 11.30
10.77 NT 11.33
10.83 EB 11.33
10.90 LT 11.37
10.90 DZ 11.50
% responding labs Frequency
20 ---------------------------
jg. _--__ ___________________ -
1
: T >.ll
SM 11.53 CX
L 11.57 AP
CG 11.87 PG
AK 12.30 SL
K 12.40 I
DB 13,27 VI
SX 15.83 x VA
KT 15.93 x P
AE 21.00 x OZ
Q 28.93 x PW
distribution
m . , ,. .
h
It
ml.. -
mill. . _
-6 -4 -2 0 +2 +4 +6
Normalized deviation of the mean from the known value
% responding labs Frequency distribution
-------------- _----___----
10 .... ...I
- T !"
. . ____,._,_,.._____-__
li
It
||||M _
llllll._. _
-6 -4 -20+2+4 +6
Normalized deviation of the mean from the grand average
= No data submitted TAG SYMBOLS ft s Above control limit
0 = Insufficient data x = Determined to be an outlier Ji = Below control limit
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