&EPA
United States
Environmental Protection
Agency
Office of Research and
Development
Washington, DC 20460
EPA/600/R-96/047A
April 1996
Blind-A Performance
Evaluation Study
A Statistical Evaluation of
the October 17, 1995 Data
REGULAIIUN ULvt-UiNVit-W! BKANCH
U.S. EPA, REGION M
U 8. Environmental Protection Agency
Region 5, library JM.-12A nofl.
77 West Jackson Boulevard, 12tn noor
Chicago, M 60604-3590
023RSL96 COV-047A
-------
Blind-A
Performance Evaluation Study
October 17, 1995
Environmental Protection Agency
National Exposure Research Laboratory
Characterization Research Division
Las Vegas, Nevada
U.S. Environmental Protection Agency
Region 5, Library (P
-------
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 Analytical Sciences Branch (CRD-LV)
Performance Evaluation Study for Blind-A; October 17, 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 702/798-21 04 or Patricia Honsa at 702/798-2141 .
Sincerely,
George Dilbeck
Team Leader
RADQA Program
Enclosure
-------
NOTICE
This material has been funded wholly by
the U.S. Environmental Protection Agency.
It has been subjected to the Agency's review,
and has been approved for publication as
an EPA document.
-------
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
1/30
o
o
o
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, 17-Oct-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 Patricia Honsa, CRD-LV, 702/798-2141.
-------
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
3/30
o
Gross Alpha Statistical Summary 189 Participants
The known value of this nuclide is 99.4 pCi/1 with an expected precision of 24.9; the control limits
are 56.2 to 142.6; the warning regions are 56.2 to 70.6 and 128.2 to 142.6
43(22.8 %) Failed to respond \
5(2.6 %) Outliers *
5(2.6 %) Out of control '
but not an outlier
Statistic
123(65.1 %) Within all limits
Respondents
- 13(6.9 %) In warning zone
but within control
Non-outliers
o
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
102.50 Grand Avg 101.68
25.09 17.82
629.57 317.69
24.48 17.53
3.12 2.30
0.12 0.13
101.72 101.67
2.33 2.28
0.09 0.13
O
10(6.8 %) More than 3 norm. S.D.
13(8.9 %) Between 2 and 3 norm. S.D.
90(61.6 %) Within 1 norm. S.D.
of known value
33(22.6 %) Between 1 and 2 norm. S.D.
-------
4/30
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
1
Gross Alpha
Lab
A
AE
AF
AH
AI
AJ
AK
AL
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
ex
D
DB
DD
DE
DG
DI
DL
DM
=
0 s
Res. 1
106.6
72.6
105.2
83.1
99.7
109.1
118.9
98.0
109.4
144.8
110.8
23.4
95.3
113.1
102.2
198.0
94.6
144.0
100.9
122.3
94.0
98.6
109.2
99.1
99.5
101.6
91.0
106.0
2.5
94.8
108.8
95.9
102.0
96.0
107.6
133.0
74.8
93.9
Res. 2
103.0
72.2
107.1
73.5
86.9
99.6
113.9
102.6
88.4
140.7
109.5
25.1
95.1
101.8
102.2
191.5
99.6
133.0
103.1
134.4
88.5
97.1
102.0
124.9
101.4
102.5
100.0
105.0
2.5
87.4
103.8
96.3
100.0
100.0
106.0
133.0
66.3
108.0
Res. 3
93.0
72.2
102.4
81.1
105.6
109.0
122.8
104.7
83.6
145.3
111.4
22.9
89.9
107.5
103.9
185.0
96.3
105.0
99.3
139.1
105.5
97.0
94.4
98.0
91.2
103.7
93.0
110.0
2.6
99.3
112.5
97.5
103.0
100.0
103.2
133.0
64.4
90.8
No data submitted
Insufficient
data
x =
Exper.
Sigma
7.05
0.23
2.36
5.06
9.56
5.46
4.46
3.43
13.72
2.52
0.97
1.15
3.06
5.65
0.98
6.50
2.54
20.11
1.91
8.67
8.67
0.90
7.40
15.22
5.42
1.05
4.73
2.65
0.06
6.01
4.37
0.83
1.53
2.31
2.23
0.00
5.54
9.17
Rng anal
(R + SR)
0.323
0.009
0.111
0.228
0.444
0.225
0.211
0.159
0.612
0.109
0.045
0.052
0.128
0.268
0.040
0.308
0.119
0.925
0.090
0.399
0.403
0.038
0.351
0.638
0.242
0.050
0.213
0.119
0.002
0.282
0.206
0.038
0.071
0.095
0.104
0.000
0.247
0.408
Average
100.87
72.33
104.90
79.23
'
97.40
105.90
118.53
101.77
93.80
143.60
110.57
23.80
93.43
107.47
102.77
191.50
96.83
127.33
101.10
131.93
96.00
97.57
101.87
107.33
97.37
102.60
94.67
107.00
2.53
93.83
108.37
96.57
101.67
98.67
105.60
133.00
68.50
97.57
TAG SYMBOLS
Determined
to be an outlier
Normalized deviation
(grand-avg) (known) Tag
-0.06
-2.04
0.22
-1.56
-0.30
0.29
1.17
0.01
-0.55
2.92
0.62
-5,42
-0.57
0.40
0.08
6.25
-0.34
1.78
-0.04
2.10
-0.40
-0.29
0.01
0.39
-0.30
0.06
. -0.49
0.37
-6.90
-0.55
0.46
-0.36
0.00
-0.21
0.27
2.18
-2.31
-0.29
ft = Above
1} = Below
0.10
-1.88
0.38
-1.40
-0.14
0.45
1.33
0.16
-0.39
3.07 ft
0.78
-5.26 x
-0.42
0.56
0.23
6.41 X
-0.18
1.94
0.12
2.26
-0.24
-0.13
»
0.17
0.55
-0.14
0.22
-0.33
0.53
*
-6.74 x
-0.39
0.62
-0.20
0.16
-0.05
0.43
2.34
-2.15
-0.13
*
»
control limit
control limit J
-------
o
o
o
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
5/30
Gross Alpha
Lab
DO
DS
DT
DZ
E
EB
EL
EO
ER
EV
FF
FJ
FL
FN
FU
FZ
GE
GI
GQ
GT
GZ
HI
HK
HL
HP
HX
I
1C
ID
J
JE
JG
JN
JQ
JS
JX
JY
K
KE
KT
KX
L
LF
LL
Res. 1
96.6
105.0
92.4
112.1
103.7
88.0
115.0
93.3
87.7
91.0
120.0
104.3
118.0
61.2
295.1
99.0
98.0
115.9
100.4
84.9
101.0
107.5
95.8
114.6
93.0
104.4
96.6
154.1
97.0
81.9
129.5
173.7
126.0
112.6
110.0
Res. 2
95.7
108.0
95.0
112.2
105.4
96.0
111.0
101.9
85.8
93.0
116.0
95.4
111.0
60.4
176,2
101.9
100.0
118.3
100.4
76.4
105.1
98.2
105.6
113.7
79.3
104.8
115.9
158.2
99.7
96.2
132.7
173.1
127.0
113.7
100.0
Res. 3
94.1
102.0
94.1
109.8
105.0
88.0
112.0
113.5
85.3
94.0
128.0
101.9
118.0
60.8
230.0
102.8
97.0
117.4
100.4
79.4
108.7
110.6
122.5
100.8
82.0
107.9
110.6
154.0
98.4
78.3
129.5
180.7
136.0
113.4
100.0
s No data submitted
0 =
Insufficient
data
x =
Exper.
Sigma
1.27
3.00
1.32
1.36
0.89
4.62
2.08
10.14
1.27
1.53
6.11
4.60
4.04
0.40
59.54
1.99
1.53
1.21
0.03
4.31
3.85
6.45
13.51
7.72
7.26
1.92
9.97
2.40
1.35
9.47
1.85
4.23
5.51
0.57
5.77
Rng anal
(R + SR)
0.059
0.142
0.062
0.057
0.040
0.190
0.095
0.479
0.057
0.071
0.285
0.211
0.166
0.019
4.468
0.090
0.071
0.057
0.000
0.202
0.183
0.294
0.633
0.327
0.325
0.083
0.458
0.100
0.064
0.425
0.076
0.180
'
0.237
0.026
0.237
Normalized deviation
Average
95.47
105.00
93.83
111.37
104.70
90.67
112.67
102.90
86.27
92.67
121.33
100.53
115.67
60.80
233.77
101.23
98.33
117.20
100.40
80.23
104.93
105.43
107.97
109.70
84.77
105.70
107.70
155.43
98.37
85.47
130.57
175.83
129.67
113.23
103.33
TAG SYMBOLS
Determined
to be an outlier
(grand-avg)
-0.43
0.23
-0.55
0.67
0.21
-0.77
0.76
0.08
-1.07
-0.63
1.37
-0.08
0.97
-2.84
9.19
-0.03
-0.23
1.08
-0.09
-1.49
0.23
0.26
0.44
0.56
-1.18
0.28
0.42
3.74
-0.23
-1.13
2.01
5.16
1.95
0.80
0.11
It = Above
li s Below
(known)
-0.27
0.39
-0.39
0.83
0.37
-0.61
0.92
0.24
-0.91
-0.47
1.53
0.08
1.13
-2.69
9.35
0.13
-0.07
1.24
0.07
-1.33
0.38
0.42
0.60
0.72
-1.02
0.44
0.58
3.90
-0.07
-0.97
2.17
5.32
2.11
0.96
0.27
control
control
Tag
*
*
»
X
tr
»
X
*
limit
limit
-------
^ =
6/30
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
)
Gross Alpha
Exper. Rng anal
Lab
LR
LT
M
MA
MF
MP
MQ
MV
MY
N
NA
NH
NJ
NK
NO
NT
O
OF
OS
OX
OY
OZ
P
PA
PB
PG
PI
PM
PQ
PR
PV
PW
Q
QC
QJ
QP
QQ
QT
QU
QW
QX
QZ
RD
RF
RG
Res. 1
99.0
91.9
119.0
125.0
81.0
84.0
82.1
87.5
89.7
115.0
111.0
96.4
124.3
143.0
93.7
105.7
151.0
87.6
65.2
107.1
137.1
83.9
84.3
85.0
127.4
108.6
92.0
118.9
138.4
100.2
65.0
92.9
86.0
97.6
147.1
112.0
Res. 2
83.0
101.0
127.0
128.0
84.0
82.0
71.9
106.6
95.7
113.0
114.0
94.2
128.0
124.0
92.1
105.0
147.0
113.6
71.4
102.1
125.0
96.6
75.2
86.4
112.4
108.9
93.0
119.5
137.2
106.2
65.6
83.5
85.8
109.8
135.9
108.0
Res. 3
102.0
100.0
128.0
131.0
90.0
86.0
71.4
86.5
93.2
111.0
119.0
95.9
135.2
117.0
91.2
96.0
143.0
95.9
66.3
107.7
110.0
93.7
85.1
91.7
109.8
109.8
92.0
123.9
126.9
101.6
61.6
83.8
86.8
108.1
149.1
119.0
= No data submitted
(7! =
Insufficient
data
X s
Sigma (R
10.21
4.99
4.93
3.00
4.58
2.00
6.04
11.33
3.01
2.00
4.04
1.15
5.54
13.45
1.27
5.41
4.00
13.28
3.31
3.07
13.58
6.65
5.50
3.53
9.50
0.62
0.58
2.73
6.32
3.14
2.16
5.34
0.53
6.61
7.11
5.57
+ SR)
0.451
0.216
0.213
0.142
0.213
0.095
0.254
0.477
0.142
0.095
0.190
0.052
0.259
0.617
0.059
0.230
0.190
0.617
0.147
0.133
0.643
0.301
0.235
0.159
0.417
0.028
0.024
0.119
0.273
0.142
0.095
0.223
0.024
0.289
0.313
0.261
Average
94.67
97.63
124.67
128.00
85.00
84.00
75.13
93.53
92.87
113.00
114.67
95.50
129.17
128.00
92.33
102.23
147.00
99.03
67.63
105.63
124.03
91.40
81.53
87.70
116.53
109.10
92.33
120.77
134.17
102.67
64.07
86.73
86.20
105.17
144.03
113.00
TAG SYMBOLS
Determined to be an outlier
Normalized deviation
(grand-avg) (known) Tag
-0.49
-0.28
1.60
1.83
-1.16
-1.23
-1.85
-0.57
-0.61
0.79
0.90
-0.43
1.91
1.83
-0.65
0.04
3.15
-0.18
-2.37
0.27
1.55
-0.72
-1.40
-0.97
1.03
0.52
-0.65
1.33
2.26
0.07
-2.62
-1.04
-1.08
0.24
2.95
0.79
ft = Above
& = Below
-0.33
-0.12
1.76
*
1.99
*
-1.00
-1.07
-1.69
*
-0.41
*
-0.45
0.95
1.06
-0.27
2.07
1.99
-0.49
0.20
3.31 ft
-0.03
-2.21
0.43
1.71
*
-0.56
-1.24
-0.81
1.19
*
0.67
»
-0.49
1.49
2.42
0.23
-2.46
-0.88
-0.92
0.40
3.10 ft
*
0.95
control limit
control limit
-------
o
o
o
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
Gross Alpha
Lab Res. 1
RK
RP
RR
RU
RV
RZ
S
SC
SD
SF
SI
SL
SM
SN
SO
SR
ss
ST
sx
sz
T
TD
TG
TH
H
TJ
TL
TN
TQ
TS
TY
U
UA
UE
UK
UN
UP
uw
UY
VA
VC
VG
VH
VI
=
71.4
45.9
101.4
114.7
105.7
104.0
104.4
94.8
127.0
91.1
81.6
86.5
101.1
113.0
105.0
80.0
102.4
88.6
56.8
105.7
102.1
127.2
102.0
121.6
85.1
84.0
129.0
76.5
100.8
98.0
77.5
95.3
Res. 2
80.8
40.4
105.0
117.6
102.4
100.5
105.1
92.4
140.0
103.8
81.5
88.1
116.5
112.8
105.6
75.2
86.1
105.4
72.1
100.7
62.5
89.2
106.0
123.6
82.9
87.0
130.0
80.4
108.6
94.7
68.1
118.0
Res. 3
80.0
45.5
102.3
106.3
111.8
103.8
101.0
101.0
137.0
89.4
90.6
93.0
131.9
117.6
97.6
81.8
90.7
120.2
62.1
97.9
89.1
93.0
87.4
120.3
84.7
85.1
132.0
72.7
101.1
90.3
70.3
77.4
No data submitted
Insufficient
data
x =
Exper.
Sigma
5.21
3.07
1.87
5.87
4.77
1.97
2.19
4.44
6.81
7.87
5.23
3.39
15.40
2.72
4.46
3.41
8.40
15.81
7.77
3.95
20.19
20.93
9.79
1.66
1.17
1.52
1.53
3.85
4.42
3.86
4.92
20.35
Rng anal
(R + SR) Average
0.223
0.130
0.085
0.268
0.223
0.083
0.097
0.204
0.308
0.342
0.216
0.154
0.731
0.114
0.190
0.157
0.387
0.750
0.363
0.185
0.939
0.901
0.441
0.078
0.052
0.071
0.071
0.183
0.185
0.183
0.223
0.963
77.40
43.93
102.90
112.87
106.63
102.77
103.50
96.07
134.67
94.77
84.57
89.20
116.50
114.47
102.73
79.00
93.07
104.73
63.67
101.43
84.57
103.13
98.47
121.83
84.23
85.37
130.33
76.53
103.50
94.33
71.97
96.90
TAG SYMBOLS
Determined
to be an
outlier
7/30
Normalized deviation
(grand-avg) (known) Tag
-1.69
-4.02
0.08
0.78
0.34
0.08
0.13
-0.39
2.29
-0.48
-1.19
-0.87
1.03
0.89
0.07
-1.58
-0.60
0.21
-2.64
-0.02
-1.19
0.10
-0.22
1.40
-1.21
-1.13
1.99
-1.75
0.13
-0.51
-2.07
-0.33
ft = Above
U = Below
-1.53
-3.86
0.24
0.94
0.50
0.23
0.29
-0.23
2.45
-0.32
-1.03
-0.71
1.19
1.05
0.23
-1.42
-0.44
0.37
-2.49
0.14
-1.03
0.26
-0.06
1.56
-1.05
-0.98
2.15
-1.59
0.29
-0.35
-1.91
-0.17
control
control
*
*
H
,
*
,
*
*
*
limit
limit
-------
8/30 CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
Gross Alpha
Lab Res. 1 Res. 2
VJ
VM
VO 88.3 82.5
VT
W 124.0 116.0
WE 102.1 95.6
WF 81.4 87.3
WO
X 102.8 123.5
Exper. Rng anal
Res. 3 Sigma (R + SR)
75.2 6.56 0.311
118.0 4.16 0.190
90.4 5.86 0.278
92.0 5.31 0.251
122.6 11.70 0.491
Normalized deviation
Average (grand-avg) (known)
82.00 -1.37 -1.21
119.33 1.23 1.39
96.03 -0.39 -0.23
86.90 -1.03 -0.87
116.30 1.02 1.18
Tag
*
*
Data sorted by Laboratory Average
Average Tag
2.53 x
23.80 x
43.93 U
60.80
63.67
64.07
67.63
68.50
71.97
72.33
75.13
76.53
77.40
79.00
79.23
80.23
81.53
82.00
84.00
! 84.23
84.57
84.57
84.77
85.00
85.37
85.47
86.20
86.27
86.73
86.90
87.70
89.20
90.67
= No data submitted
0 =5 Insufficient data
Lab Average Tag
CO 91.40
AZ 92.33
RU 92.33
GQ 92.67
TG 92.87
QU 93.07
PA 93.43
DG 93.53
VH 93.80
AE 93.83
MY 93.83
UN 94.33
RK 94.67
SZ 94.67
AH 94.77
HP 95.47
PQ 95.50
VO 96.00
MV 96.03
TY 96.07
TL 96.57
SN 96.83
JE 96.90
MQ 97.37
U 97.40
JY 97.57
QX 97.57
FJ 97.63
QW 98.33
WF 98.37
PR 98.47
SO 98.67
EO 99.03
TAG SYMBOLS
Lab Average Tag
PM 100.40
QJ 100.53
OS 100.87
FL 101.10
NJ 101.23
T 101.43
BA 101.67
NA 101.77
AR 101.87
DZ 102.23
CQ 102.60
UW 102.67
LR 102.73
CJ 102.77
SM 102.77
DS 102.90
NT 102.90
BO 103.13
WE 103.33
SI 103.50
CX 103.50
BH 104.70
VI 104.73
CE 104.90
AJ 104.93
DI 105.00
BS 105.17
LT 105.43
HI 105.60
JS 105.63
TQ 105.70
DB 105.90
P 106.63
1T = Above control
x s Determined to be an outlier & = Below control
Lab
HL
FU
A
BM
GZ
TH
D
AP
C
OX
CG
QT
sx
BC
SD
RZ
EV
TN
LF
UP
SF
EB
TD
AF
I
DT
QZ
1C
DD
PB
JG
AK
SC
limit
limit
-------
o
o
Gross Alpha
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
9/3
Data sorted by Laboratory Average
Average
107.00
107.33
107.47
107.70
107.97
108.37
109.10
109.70
110.57
111.37
112.67
112.87
113.00
113.00
113.23
% responding
in. ------
-6
Tag. Lab
CK
CA
BB
JN
ID
CS
Q
J
AW
E
ER
S
RG
NK
L
Average
114.47
114.67
115.67
116.30
116.50
116.53
117.20
118.53
119.33
120.77
121.33
121.83
124.03
124.67
127.33
128.00
labs Frequency
II
ml
-4 -2
Tag Lab
SS
NO
FZ
X
SR
PV
HK
AL
W
QP
FN
TS
PG
M
BK
OF
Average Tag
128.00
129.17
129.67
130.33
130.57
131.93
133.00
134.17
134.67
143.60 ft
144.03 ft
147.00 ft
155.43 ft
175.83 x
191.50 x
233.77 x
distribution
.fl.--|l. T
6 +2 +4
La
M
0
1C
IL
K
Bl
Dl
Q<
SI
Al
Rl
O^
JC
Kl
B(
Gr
A
Normalized deviation of the mean from the known value
% responding
in- ------
labs Frequency
_
, .ll.ll
distribution
_
Jf
Illlill
+2 +4
Normalized deviation of the mean from the grand average
O
s No data submitted
0 = Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft = Above control limit
JJ- = Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
10/30
o
Radium-226 Statistical Summary 189 Participants
The known value of this nuclide is 24.8 pCi/1 with an expected precision of 3.7; the control limits
are 18.4 to 31.2; the warning regions are 18.4 to 20.5 and 29.1 to 31.2
85(45.0 %) Failed to respond
5(2.6 %) Outliers
13(6.9 %) Out of control
but not an outlier
Statistic
. 77(40.7 %) Within all limits
Respondents
-- 9(4.8 %) In warning zone
but within control
Non-outliers
o
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
25.63
23.62
558.12
92.18
3.35
0.04
24.07
-2.96
-0.03
Grand Avg 23.27
3.78
14.27
16.23
-6.16
-0.40
24.03
-3.09
-0.20
O
18(17.3 %) More than 3 norm. S.D. ,
<
9(8.7 %) Between 2 and 3 norm. S.D.
5(52.9 %) Within 1 norm. S.D.
of Known value
22(21.2 %) Between 1 and 2 norm. S.D.
-------
(( =
11/30
CRD-LV
Performance Evaluation: Blind- A, 17-Oct-1995
1
Radium-226
Lab
A
AE
AF
AH
AI
AJ
AK
AL
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
ex
D
DB
DD
DE
DG
DI
DL
DM
=
0 3
V:
Res. 1
23.4
23.3
24.7
27.3
22.2
24.2
26.4
21.0
20.7
23.6
18.6
26.3
24.0
20.5
23.6
22.5
25.1
24.4
23.4
24.8
19.9
23.4
24.0
18.9
26.2
21.9
24.7
Res. 2
24.4
23.6
23.7
26.7
20.6
23.4
26.9
21.0
20.8
26.7
18.2
25.5
45.0
24.4
23.7
21.8
26.5
23.4
24.9
24.3
23.8
22.6
25.0
18.0
25.4
22.8
24.7
Res. 3
24.3
24.0
23.9
26.7
22.2
25.3
27.7
21.6
22.7
29.2
17.6
27.6
44,0
21.8
23.6
22.4
24.9
22.7
26.0
24.3
20.7
25.3
25.0
22.9
24.9
22.0
24.7
No data submitted
Insufficient
data
X s
Exper.
Sigma
0.55
0.35
0.53
0.35
K <
0.92
0.95
0.66
0.35
1.13
2.81
0.50
1.06
11,85
1.99
0.06
0.38
0.87
0.85
1.31
0.29
2.06
1.39
0.58
2.61
0.66
0.49
0.01
Rng anal
(R + SR) Average
0.160
0.112
0.160
0.096
0.255
0.303
0.208
0.096
0.319
0.894
0.160
0.335
5.481
0.623
0.016
0.112
0.255
0.271
0.415
0.080
0.623
0.431
0.160
0.782
0.208
0.144
0.000
24.03
23.63
24.10
26.90
21.67
24.30
27.00
21.20
21.40
26.50
18.13
26.47
37.67
22.23
23.63
22.23
25.50
23.50
24.77
24.47
21.47
23.77
24.67
19.93
25.50
22.23
24.70
TAG SYMBOLS
Determined
to be an
outlier
Normalized deviation
(grand-avg) (known) Tag
0.36
0.17
0.39
1.70
-0.75
0.48
1.74
-0.97
-0.88
1.51
-2-.41
1.50
6,74
-0.49
0.17
-0.49
1.04
0.11
0.70
0.56
-0.85
0.23
0.65
-1.56
1.04
-0.49
0.67
IT = Above
U = Below
-0.36
-0.55
-0.33
0.98
-1.47
-0.23
1.03
-1.69
-1.59
0.80
-3.12
0.78
6.02
-1.20
-0.55
-1.20
0.33
-0.61
-0.02
-0.16
-1.56
-0.48
-0.06
-2.28
0.33
-1.20
-0.05
control
control
«
*
*
|l
*
X
*
*
*
*
*
*
*
*
limit
limit J
-------
o
o
o
i
Radium-226
Lab Res. 1
DO
DS
DT
DZ
E
EB
EL
EO
ER
EV
EX
FF
FJ
FL
FN
FU
FZ
GE
61
GQ
GT
GZ
HI
HK
HL
HP
HX
I
1C
ID
J
JE
JG
JN
JQ
JS
JX
JY
K
KE
KT
EX
L
LF
LL
=
0 s
23.4
25.7
20.0
24.3
26.9
25.4
24.3
21.5
32.0
20.4
26.0
21.6
26.7
24.8
14.9
22.2
27.6
16.8
23.2
23.0
24.4
21.7
24.5
CRD-LV
Res. 2
25.4
27.5
20.0
24.6
25.1
25.4
24.0
19.5
33.0
19.7
25.3
21.6
23.9
24.1
16.5
24.5
32.6
18.9
21.0
24.2
28.0
20.3
24.3
Performance Evaluation: Blind-A, 17-Oct-1995
Res. 3
24.4
27.1
20.4
25.0
26.0
22.5
24.8
19.9
32.0
19.0
26.8
21.6
26.0
24.6
15.4
24.6
23.9
18.4
22.3
25.2
29.2
21.0
24.9
No data submitted
Insufficient
data
X ~
Exper. Rng anal
Sigma (R + SR) Average
1.00
0.95
0.23
0.35
0.90
1.67
0.40
1.06
0.58
0.70
0.75
0.01
1.46
0.36
0.82
1.36
4.37
1.10
1.11
1.10
2.50
0.70
0.31
0.319
0.287
0.064
0.112
0.287
0.463
0.128
0.319
0.160
0.223
0.239
0.000
0.447
0.112
0.255
0.383
1.741
0.335
0.351
0.351
0.766
0.223
0.096
-
24.40
26.77
20.13
24.63
26.00
24.43
24.37
20.30
32.33
19.70
26.03
21.60
25.53
24.50
15.60
23.77
28.03
18.03
22.17
24.13
27.20
21.00
24.57
TAG SYMBOLS
Determined to
be an outlier
12/30
Normalized deviation
(grand-avg) (known) Tag
0.53
1.64
-1.47
0.64
1.28
0.54
0.51
-1.39
4.24
-1.67
1.29
-0.78
1.06
0.57
-3.59
0.23
2.23
-2.45
-0.52
0.40
1.84
-1.06
0.61
ft = Above
!! = Below
-0.19
0.92
-2.18
-0.08
0.56
-0.17
-0.20
-2.11
3.53
-2.39
0.58
-1.50
0.34
-0.14
-4.31
-0.48
1.51
-3.17
-1.23
-0.31
1.12
-1.78
-0.11
control
control
*
*
*
ft
*
' *
*
«
»
u
u
»
*
«
limit
limit
-------
13 /
30
CRD-LV Performance Evaluation: Blind- A, 17-Oct-1995
1
Radium-226 1
Lab
LR
LT
M
MA
MF
MP
MQ
MV
MY
N
NA
NH
NJ
NK
NO
NT
O
OF
OS
OX
OY
OZ
P
PA
PB
PG
PI
PM
PQ
PR
PV
PW
Q
QC
QJ
QP
QQ
QT
QU
QW
QX
QZ
RD
RF
RG
=
0 s
Res. 1
268.0
19.0
22.9
28.6
28.0
29.9
24.8
19.5
25.3
16.0
33.0
24.6
20.3
8,0
22.1
24.2
32.0
16.6
12.8
14.9
24.6
15.2
23.4
19.2
24.0
Res. 2
252,0
28.1
20.8
26.7
32.0
30.1
24.9
16.5
25.4
15.2
32.8
24.4
20.7
9.3
26.8
21.8
27.2
14.3
13.9
15.6
25.0
16.6
22.7
21.2
26.0
Res. 3
257.0
24.3
20.4
25.0
26.0
31.7
24.9
14.3
25.7
15.0
31.5
24.9
19.0
mo
23.2
23.2
31.1
16.5
12.4
15.9
25.0
16.1
23.2
21.4
24.0
No data submitted
Insufficient
data
x =
Exper.
Sigma
8.19
4.57
1.34
1.80
3.06
0.99
0.06
2.61
0.21
0.53
0.81
0.25
0.89
<\ '
1.01
2.46
1.21
2.55
1.30
0.78
0.51
0.23
0.71
0.36
1.22
1.15
>
Rng anal
(R + SR)
3,960
1.862
0.399
0.575
0.958
0.287
0.016
0.830
0.064
0.160
0.239
0.080
0.271
0.319
0.750
0.383
0.766
0.367
0.239
0.160
0.064
0.223
0.112
0.351
0.319
Average
259.00
23.80
21.37
26.77
28.67
30.57
24.87
16.77
25.47
15.40
32.43
24.63
20.00
9,10
24.03
23.07
30.10
15.80
13.03
15.47
24.87
15.97
23.10
20.60
24.67
TAG SYMBOLS
Determined
to be an outlier
Normalized
(grand-avg)
110.35
0.25
-0.89
1.64
2.53
3.41
0.75
-3.05
1.03
-3.69
4.29
0.64
-1.53
-6,63
0.36
-0.10
3.20
-3.50
-4.79
-3.65
0.75
-3.42
-0.08
-1.25
0.65
deviation
(known) Tag
109.63
-0.47
-1.61
0.92
1.81
2.70
0.03
-3.76
0.31
-4.40
3.57
-0.08
-2.25
-7.35
-0.36
-0.81
2.48
-4.21
-5.51
-4.37
0.03
-4.14
-0.80
-1.97
-0.06
11 = Above control
§ = Below control
X
.
*
*
*
m
+
*
.
*
U
H
n
*
X
*
11
*
Ji
U
*
Ji
limit
limit 1
-------
o
o
o
CRD-LV Performance Evaluation: Blind- A, 17-Oct-1995
14
/3<
Radium-226
Lab
RK
RP
RR
RU
RV
RZ
S
sc
SD
SF
SI
SL
SM
SJST
so
SR
ss
ST
sx
sz
T
ID
TO
TH
TI
TJ
TL
TN
TQ
TS
TY
U
UA
HE
UK
UN
UP
UQ
uw
UY
VA
VC
VG
VH
VI
Res. 1
26.4
24.4
23.8
25.0
23.2
21.0
21.2
11.7
23.7
23.6
21.7
24.4
24.0
25.0
58.1
23.7
22.9
18.2
24.7
29.7
26.4
15.2
21.9
24.7
24.9
22.7
22.6
Res. 2
24.9
21.8
21.8
24.9
24.4
20.0
24.3
7*3
25.7
23.7
22.9
22.1
25.3
25.1
48.2
23.9
6.3
20.1
28.5
31.8
25.7
14.5
26.8
25.8
23.9
18.2
20.3
Res. 3
24.1
20.0
23.5
25.0
25.7
21.2
19.3
10.6
22.7
24.5
24.0
23.8
23.4
25.7
31.3
26.9
5.2
22.9
27.4
29.5
26.5
12.9
24.4
24.5
24.6
21.6
21.4
= No data submitted
0 =
Insufficient
data
x =
Exper.
Sigma
1.17
2.21
1.08
0.06
1.25
0.64
2.52
2.29
1.53
0.49
1.15
1.19
0.97
0.38
13.55
1.79
9.92
2.36
1.96
1.27
0.44
1.18
2.45
0.70
0.51
2.35
1.15
Rng anal
(R + SR)
0.367
0.702
0.319
0.016
0.399
0.192
0.798
0.702
0.479
0.144
0.367
0.367
0.303
0.112
7.244
0.511
4.477
0.750
0.607
0.367
0.128
0.367
0.782
0.208
0.160
0.718
0.367
Average
25.13
22.07
23.03
24.97
24.43
20.73
21.60
9.87
24.03
'
23.93
22.87
23.43
24.23
25.27
45.87
24.83
11.47
20.40
26.87
30.33
26.20
14.20
24.37
25.00
24.47
20.83
2.1.43
TAG SYMBOLS
Determined
to be an outlier
Normalized deviation
(grand-avg) (known)
0.87
-0.56
-0.11
0.79
0.54
-1.19
-0.78
-6.28
0.36
0.31
-0.19
0.08
0.45
0.93
10.58
0.73
-5.53
-1.34
1.68
3.31
1.37
-4.25
0.51
0.81
0.56
-1.14
-0.86
ft = Above
U = Below
0.16
-1.28
-0.83
0.08
-0.17
-1.90
-1.50
-6,90
-0.36
-0.41
-0.91
-0.64
-0.27
0.22
9.86
0.02
-6.24
-2.06
0.97
2.59
0.66
-4.96
-0.20
0.09
-0.16
-1.86
-1.58
Ta,
*
X
*
*
*
X
*
*
U
*
»
U
*
«
*
control limit
control limit
-------
15/30
Radium-226
Lab Res. 1
VJ
VM
VO
VT
W 21.1
WE
WF
WO
X 23.1
tH^^MH
Average
9.10
9.87
11.47
13.03
14.20
15.40
15.47
15.60
15.80
15.97
16.77
18.03
18.13
19.70
19.93
20.00
20.13
20.30
20.40
20.60
20.73
20.83
21.00
21.20
21.37
21.40
21.43
21.47
21.60
21.60
21.67
22.07
22.17
CRD-LV Performance Evaluation: Blind- A, 17-Oct-1995
Exper.
Res. 2 Res. 3 Sigma
23.6 23.0 1.31
27.9 23.1 2.77
^ . ,
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.399 22.57 -0.33 -1.05
0.766 24.70 0.67 -0.05
^^^^^Mi^^^Mi^H^H
*
*
i^^^
Data sorted by Laboratory Average
Tag Lab
x PQ
x SI
U TL
U QQ
li UN
U OY
li QT
U ID
U QJ
U QX
U OF
U JG
U BA
GQ
CK
PG
E
FN
TN
RD
SD
VH
K
AU
M
AW
VI
CE
SF
HL
AK
RU
JS
Average
22.23
22.23
22.23
22.57
22.87
23.03
23.07
23.10
23.43
23.50
23.63
23.63
23.77
23.77
23.80
23.93
24.03
24.03
24.03
24.10
24.13
24.23
24.30
24.37
24.37
24.40
24.43
24.43
24.47
24.47
24.50
24.57
24.63
Tag Lab
DB
BM
BH
W
SS
RZ
PW
QZ
sx
BO
BK
AE
J
CG
LT
SO
PV
A
SM
AF
JX
sz
AL
UP
ER
DT
SC
EO
UW
CA
I
L
PB
Average Tag
24.63
24.67
24.67
24.70
24.70
24.77
24.83
24.87
24.87
24.97
25.00
25.13
25.27
25.47
25.50
25.50
25.53
26.00
26.03
26.20
26.47
26.50
26.77
26.77
26.87
26.90
27.00
27.20
28.03
28.67
30.10
30.33
30.57 .
s No data submitted TAG SYMBOLS ft = Above control
0 = Insufficient
data x = Determined
to be an outlier !) = Below control
Lab
EB
RF
CJ
X
DE
C
TI
QU
NT
S
UQ
RK
T
OX
CS
BN
HP
EL
HK
U
BC
AZ
NH
DZ
TQ
AH
AP
JY
JE
NJ
Q
TS
NO
limit
limit
-------
o
o
o
CRD-LV Performance
Evaluation: Blind-A, 17-Oct-1995
Raditun-226
Data sorted by Laboratory Average
Average Tag Lab Average Tag Lab Average Tag
32.33 ft FZ 32.43
37.67
ft P 45.87 x
x BG 259.00 x
16/30
Lai
TE
LB
% responding labs Frequency distribution
_
10. ^j
III 1
-6 -4 -2 0 +2 +4
Normalized deviation of the mean from the known value
% responding labs Frequency distribution
in. - - -
IU- ________
1:;; ::;::::::::::
|-_.
ii.-i. _ _ _. .
-6 -4 -2 0 +2 +4
Normalized deviation of the mean from the grand average
+6
+6
s No data submitted TAG SYMBOLS ft = Above control limit
[ 0 = Insufficient data x = Determined to be an outlier 11 = Below control limit
-------
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
17
o
o
o
Radivun-228 Statistical Summary 189 Participant
The known value of this nuclide is 20.7 pCi/1 with an expected precision of 5.2; the control limits
are 11.7 to 29.7; the warning fegions are 11.7 to 14.7 and 26.7 to 29.7
93(49.2 %) Failed to respond
3(1.6 %) Outliers
. 87(46.0 %) Within all limits
----6(3.2 %) In warning zone
but within contra
Statistic
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
Respondents
20.17
3.59
12.92
17.82
-2.56
-0.15
20.53
-0.81
-0.05
Non-outliers
Grand Avg 20.31
2.75
7.56
13.54
-1.88
-0.14
20.60
-0.48
-0.04
3(3.1 %) More than 3 norm. S.D.
I
6(6.3 %) Between 2 and 3 norm. S
.-77(80.2 %) Within 1 norm. S.D.
t
of known value
1O(1O.4 %) Between 1 and 2 norm. S.D.
-------
18/30
CRD-LV Performance Evaluation: Blind- A, 17-Oct-1995
Radium-228
Lab
A
AE
AF
AH
AI
AJ
AK
AL
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
ex
D
DB
DD
DE
DG
DI
DL
DM
=
0 =
Res. 1
20.6
17.6
22.7
20.2
22.6
18.8
16.1
3.2
16.0
24.3
21.4
18.2
21.1
19.7
18.5
18.6
21.4
20.9
17.4
18.8
20.0
20.4
14.4
20.5
22.8
Res. 2
17.8
19.2
22.1
21.7
20.4
22.9
18.8
3.7
15.9
20.4
21.6
17.4
18.3
19.4
20.0
18.7
21.0
20.7
18.9
17.7
20.0
17.4
14.0
22.8
22.8
Res. 3
18.8
19.9
22.4
20.8
20.0
19.0
21.1
3.4
15.8
22.7
21.7
16.9
18.3
18.7
19.0
20.6
19.8
18.7
19.5
21.5
19.0
22.3
14.6
23.4
22.9
No data submitted
Insufficient
data
x =
Exper. Rng anal Normalized deviation
Sigma (R + SR) Average (grand-avg) (known) Tag
1.42
1.18
0.30
0.75
1.40
2.31
2.50
0.25
0.10
1.96
0.15
0.66
1.62
0.51
0.76
1.13
0.83
1.22
1.08
1.96
0.58
2.47
0.31
1.53
0.06
0.318
0.261
0.068
0.170
0.295
0.466
0.568
0.057
0.023
0.443
0.034
0.148
0.318
0.114
0.170
0.227
0.182
0.250
0.239
0.432
0.114
0.557
0.068
0.329
0.011
19.07
18.90
22.40
20.90
21.00
20.23
18.67
3.43
15.90
22.47
21.57
17.50
19.23
19.27
19.17
19.30
20.73
20.10
18.60
19.33
19.67
20.03
14.33
22.23
22.83
TAG SYMBOLS
Determined
to be an
outlier
-0.41
-0.47
0.70
0.20
0.23
-0.03
-0.55
-0.62
-1.47
0.72
0.42
-0.94
-0.36
-0.35
-0.38
-0.34
0.14
-0.07
-0.57
-0.33
-0.21
-0.09
-1.99
0.64
0.84
ft = Above
Jl = Below
-0.54
-0.60
0.57
0.07
».
0.10
-0.16
-0.68
*
-5.75 x
-1.60
0.59
0.29
*
-1.07
*
-0.49
-0.48
*
-0.51
-0.47
0.01
-0.20
-0.70
-0.46
-0.34
-0.22
*
*
*
-2.12
*
0.51
*
0.71
*
*
control limit
control limit
-------
o
o
o
CRD-LV Performance Evaluation: Blind- A, 17-Oct-1995
19
/30
Radium-228
Lab
DO
DS
DT
DZ
E
EB
EL
EO
ER
EV
EX
FF
FJ
FL
FN
FU
FZ
GE
GI
GQ
GT
GZ
HI
HK
HL
HP
HX
I
1C
ro
J
JE
JG
JN
JQ
JS
JX
JY
K
KE
KT
EX
L
LF
LL
Res. 1
22.6
21.8
18.4
21.5
20.6
22.3
.
10.0
12.3
20.3
20.8
19.9
18.8
27.4
21.1
24.2
24.9
20.8
20.6
24.7
17.0
19.9
Res. 2
21.3
20.8
17.5
21.3
19.7
24.0
14,0
11.3
20.8
20.8
17.2
17.4
27.8
19.9
28.6
27.1
20.7
20.1
20.5
18.6
21.0
Res. 3
19.8
20.7
18.3
20.5
20.9
20.4
8.8
12.3
20.2
20.8
17.6
19.9
25.4
19.1
26.2
20.0
20.4
21.6
22.6
18.5
21.3
= No data submitted
Insufficient
data
x =
Exper.
Sigma
1.40
0.61
0.49
0.53
0.62
1.80
2.72
0.58
0.32
0.00
1.46
1.25
1.29
1.01
2.20
3.63
0.21
0.76
2.10
0.90
0.74
Rng anal
(R + SR)
0.318
0.125
0.102
0.114
0.136
0.409
0.591
0.114
0.068
0.000
0.307
0.284
0.273
0.227
0.500
0.806
0.045
0.170
0.477
0.182
0.159
.
Average
21.23
21.10
18.07
21.10
20.40
f
22.23
10.93
11.97
20.43
20.80
18.23
18.70
26.87
20.03
26.33
24.00
20.63
20.77
22.60
18.03
20.73
TAG SYMBOLS
Determined
to be an outlier
Normalized deviation
(grand-avg) (known)
0.31
0.26
-0.75
0.26
0.03
0.64
-3.12
-2.78
0.04
0.16
-0.69
-0.54
2.18
-0.09
2.01
1.23
0.11
0.15
0.76
-0.76
0.14
IT = Above
li = Below
0.18
0.13
-0.88
0.13
-0.10
0.51
-3.25
-2.91
V. _
-0.09
0.03
-0.82
-0.67
2.05
-0.22
1.88
1.10
-0.02
0.02
0.63
-0.89
0.01
Tag
»
.
*
*
«
«
,
*
X
*
*
»
*
*
,
*
control limit
control limit
-------
f 20 /
30
CRD-LV
Performance Evaluation: Blind-A, 17-Oct-1995
Radium-228 1
Lab
LR
LT
M
MA
MF
MP
MQ
MV
MY
N
NA
NH
NJ
NK
NO
NT
O
OF
OS
OX
OY
OZ
P
PA
PB
PO
PI
PM
PQ
PR
PV
PW
Q
QC
QJ
QP
QQ
QT
QU
QW
QX
QZ
RD
RF
R6
=
0 s
Res. I
37,0
19.9
24.0
17.2
22.0
19.0
20.5
28.0
21.4
20.0
13.5
20.1
19.7
20.7
20.9
24.0
23.6
19.7
21.3
19.7
18.7
16.5
21.0
Res. 2
31,0
18.0
23.0
16.2
21.0
21.0
21.3
22.0
21.2
21.0
10.3
20.8
18.4
17.8
21.2
23.4
19.7
21.7
20.0
19.9
18.6
18.1
20.0
Res. 3
31.0
20.9
22.0
20.0
23.0
22.4
19.8
20.8
22.0
12.2
20,5
21.4
26.2
20.6
19.1
25.1
19.2
22.6
19.6
18.1
18.5
22.0
No data submitted
Insufficient
data
X s
Exper.
Sigma
3.46
1.47
1.00
*
1.00
2.00
0.95
4.24
0.31
1.00
1.61
0.35
1.50
4.27
0.30
2.67
2.79
1.32
1.30
0.15
0.32
1.06
1.00
Rng anal
(R + SR) Average
0.682
0.329
0.227
0.227
0.454
0.216
0.931
0.068
0.227
0.363
0.080
0.341
0.954
0.068
0.557
0.613
0.284
0.295
0.034
0.068
0.227
0.227
33.00
19.60
23.00
21.00
21.00
21.40
23.27
21.13
21.00
12.00
20.47
19.83
21.57
20.90
22.17
22.80
20.20
21.30
19.73
18.47
17.70
21.00
-
TAG SYMBOLS
Determined
to be an
outlier
Normalized deviation
(grand-avg) (known) Tag
4.23
-0.24
0.90
0.23
.
0.23
0.36
0.98
0.27
0.23
-2.77
0.05
-0.16
0.42
0.20
0.62
0.83
-0.04
0.33
-0.19
-0.61
-0.87
0.23
ft s Above
li = Below
4.10 x
-0.37
0.77
*
*
*
.
»
*
*
.
0
0.10
.
0.10
0.23
*
0.85
*
0.14
0.10
-2.90
*
-0.08
»
*
*
-0.29
0.29
0.07
0.49
*
0.70
*
*
-0.17
0.20
»
-0.32
-0.74
-1.00
0.10
»
control limit
control limit
-------
o
o
o
L_
CRD-LV
Performance Evaluation: Blind-A, 17-Oct-1995
21/30
Radium-228
Lab
RK
RP
RR
RU
RV
RZ
S
sc
SD
SF
SI
SL
SM
SN
SO
SR
ss
ST
sx
sz
T
TD
TG
TH
TI
TJ
TL
TN
TQ
TS
TY
U
UA
UK
UN
UP
UQ
uw
UY
VA
VC
VG
VH
VI
Res. 1
15.7
20.7
22.6
19.3
18.1
24.2
19.6
14.5
23.4
20.7
20.5
23.1
22.4
24.2
27.3
20.0
20.5
22.0
16.3
19.6
12.6
22.3
19.7
20.6
19.6
21.3
Res. 2
17.9
20.9
21.9
21.8
15.9
24.9
24.7
14.4
21.2
19.0
23.2
24.5
22.7
29.5
27.1
19.9
18.9
24.4
17.0
17.7
13.0
20.0
19.4
20.9
23.3
19.6
Res. 3
16.0
20.2
23.0
19.1
15.9
25.1
19.7
18.4
21.5
20.0
21.8
20.0
21.5
25.9
29.9
21.5
16.9
24.2
13.3
16.0
13.3
20.8
20.7
19.5
20.1
20.0
= No data submitted
1 0 =
Insufficient
data
X s
Exper.
Sigma
1.19
0.36
0.56
1.50
1.27
0.47
2.92
2.28
1.19
0.85
1.35
2.30
0.62
2.71
1.56
0.90
1.80
1.33
1.97
1.80
0.35
1.17
0.68
0.74
2.01
0.89
Rng anal
(R + SR) Average
0.250
0.080
0.125
0.307
0.250
0.102
0.579
0.454
0.250
0.193
0.307
0.511
0.136
0.602
0.318
0.182
0.409
0.273
0.420
0.409
0.080
0.261
0.148
0.159
0.420
0.193
16.53
20.60
22.50
20.07
16.63
24.73
21.33
15.77
22.03
19.90
21.83
22.53
22.20
26.53
28.10
20.47
18.77
23.53
15.53
17.77
12.97
21.03
19.93
20.33
21.00
20.30
TAG SYMBOLS
Determined
to be an outlier
Normalized deviation
(grand-avg) (known) Tag
-1.26
0.10
0.73
-0.08
-1.23
1.47
0.34
-1.51
0.57
-0.14
0.51
0.74
0.63
2.07
2.59
0.05
-0.51
1.07
-1.59
-0.85
-2.45
0.24
-0.13
0.01
0.23
0.00
IT = Above
11 = Below
-1.39
-0.03
0.60
-0.21
-1.35
1.34
0.21
-1.64
0.44
-0.27
0.38
0.61
0.50
1.94
2.46
-0.08
-0.64
0.94
-1.72
-0.98
-2.58
0.11
-0.26
-0.12
0.10
-0.13
control
control
*
*
*
»
*
,
»
*
*
*
*
*
limit
limit
-------
22/30
Radium-228
Lab Res.
VJ
VM
VO
VT
W 21.
WE
WF
WO
X 19.
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
Exper. Rng anal
1 Res. 2 Res. 3 Sigma (R + SR)
8 21.6 19.7 1.16 0.239
4 14.1 19.8 3.18 0.647
Normalized deviation
Average (grand-avg) (known)
21.03 0.24 0.11
17.77 -0.85 -0.98
)
Tag
*
*
*
Data sorted by Laboratory Average
Average
3.43
10.93
11.97
12.00
12.97
14.33
15.53
15.77
15.90
16.53
16.63
17.50
17.70
17.77
17.77
18.03
18.07
18.23
18.47
18.60
j 18.67
18.70
18.77
18.90
19.07
19.17
19.23
19.27
19.30
19.33
19.60
19.67
s No data
Tag Lab
x AU
x FZ
GQ
P
UN
cs
TS
SI
AW
RK
SC
BC
RD
X
U
K
EB
HP
QZ
CE
AP
I
TN
AE
A
BM
BH
BK
BO
CG
LT
CJ
Average Tag
19.73
19.83
19.90
19.93
20.03
20.03
20.07
20.10
20.20
20.23
20.30
20.33
20.40
20.43
20.47
20.47
20.60
20.63
20.73
20.73
20.77
20.80
20.90
20.90
21.00
21.00
21.00
21.00
21.00
21.00
21.03
21.03
submitted TAG SYMBOLS
Lab
QX
PQ
ss
UQ
CK
J
S
CA
QT
AL
VI
UW
EO
HK
TL
PB
RU
JS
L
C
JX
HL
PW
AH
VH
RF
OY
NO
NJ
AK
UP
W
Average Tag
21.10
21.10
21.13
21.23
21.30
21.33
21.40
21.57
21.57
21.83
22.03
22.17
22.20
22.23
22.23
22.40
22.47
22.50
22.53
22.60
22.80
22.83
23.00
23.27
23.53
24.00
24.73
26.33
26.53
26.87
28.10
33.00 x
ft = Above control
0 = Insufficient data x = Determined to be an outlier Ji = Below control
Lab
EL
DZ
OX
DT
QU
SF
NT
PV
BA
sx
SM
Q
T
FN
DB
AF
AZ
RZ
SZ
JY
QJ
DE
M
OF
TQ
JG
SD
JE
TD
ID
TI
LR
limit
limit
-------
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
o
o
o
Radium-228
% responding labs
Frequency distribution
20-
10-
. filHfliL.
% responding labs
20-1
-4 -20 +2 +4
Normalized deviation of the mean from the known value
Frequency distribution
10-
-6
....II
f-
-4 -20+2 +4
Normalized deviation of the mean from the grand average
-------
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
24/30
o
Uranium (Natural) Statistical Summary 190 Participants
The known value of this nuclide is 27.0 pCi/1 with an expected precision of 3.0; the control limits
are 21.8 to 32.2; the warning regions are 21.8 to 23.5 and 30.5 to 32.2
85(44.7 %) Failed to respond .
5(2.6 %) Outliers
7(3.7 %) Out of control
but not an outlier
Statistic
; 86(45.3 %) Within all limits
Respondents
--- 7(3.7 %) In warning zone
but within control
Non-outliers
o
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
26.18
4.16
17.29
15.89
-3.05
-0.20
26.47
-1.98
-0.13
Grand Avg 26.33
2.52
6.35
9.57
-2.47
-0.26
26.50
-1.85
-0.20
O
12(11.4 %) More than 3 norm. S.D
8(7.6 %) Between 2 and 3 norm. S.D. *
.53(50.5 %) Within 1 norm. S.D.
* of known value
32(30.5 %) Between 1 and 2 norm. S.D.
-------
25/30
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
1
Uranium (Natural)
Lab
A
AE
AF
AH
AI
AJ
AK
AL
AP
AR
AU
AW
AZ
BA
BB
BC
BG
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
DI
PL
=
0 =
Res. 1
25.6
28.3
30.7
25.9
26.2
22.1
22.3
25.1
27.6
29.4
22.5
27.2
24.0
28.4
30.9
26.7
27.9
23.9
24.9
28.2
26.2
27.0
23.8
23.0
32.4
5.0
42.1
30.6
22.4
24.9
25.7
Res. 2
24.4
29.9
31.4
21.1
27.5
30.1
21.7
24.6
28.7
25.9
25.2
26.8
25.5
28.8
31.5
25.5
27.3
26.6
24.2
26.6
24.7
26.7
24.3
24.0
27.9
5.0
42.0
29.2
23.7
24.9
26.9
Res. 3
25.0
29.5
29.7
26.9
28.8
29.1
21.1
24.7
29.3
26.2
21.9
27.1
22.4
29.1
27.9
25.8
27.6
26.0
29.9
24.0
26.4
27.1
24.9
24.0
29.0
6,1
42.6
29.5
24.5
24.9
24.4
No data submitted
Insufficient
data
X s
Exper. Rng anal Normalized deviation
Sigma (R + SR) Average (grand-avg) (known) Tag
0.60
0.83
0.85
3.10
1.30
4.36
0.60
0.26
0.86
1.94
1.76
0.21
1.55
0.35
1.93
0.62
0.30
1.42
3.11
2.12
0.93
0.21
0.55
0.58
2.35
0.06
0.40
0.74
1.06
0.01
1.25
0.236
0.315
0.335
1.270
0.512
2.095
0.236
0.098
0.335
0.689
0.650
0.079
0.610
0.138
0.709
0.236
0.118
0.532
1.233
0.827
0.335
0.079
0.217
0.197
0.886
0.020
0.158
0.276
0.413
0.000
0.492
25.00
29.23
30.60
24.63
27.50
27.10
21.70
24.80
28.53
27.17
23.20
27.03
23.97
28.77
30.10
26.00
27.60
25.50
26.33
26.27
25.77
26.93
24.33
23.67
29.77
5.03
42.53
29.77
23.53
24.90
25.67
TAG SYMBOLS
Determined
to be an
outlier
-0.77
1.67
2.46
-0.98
0.67
0.44
-2.67
-0.89
1.27
0.48
-1.81
0.40
-1.37
1.41
2.17
-0.19
0.73
-0.48
0.00
-0.04
-0.33
0.35
-1.15
-1.54
1.98
-12.30
9.35
1.98
-1.62
-0.83
-0.38
ft = Above
U = Below
-1.15
1.29
2.08
-1.37
*
*
0.29
0.06
*
-3.06 Ji
, ..
-1.27
0.89
0.10
-2.19
0.02
-1.75
1.02
1.79
-0.58
»*
0.35
-0.87
-0.38
*
*
-0.42
-0.71
-0.04
-1.54
-1.92
1.60
»
42.68 x
*
*
8.07 x
1.60
*
-2.00
-1.21
-0.77
control limit
control limit
-------
o
o
o
V
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
Uranium (Natural)
Lab Res. 1 Res. 2
DM
DO
DS
DT
DZ
E
EB
EL
EO
ER
EV
EX
FF
FJ
FL
FN
FU
FZ
6E
GI
GQ
GT
GZ
HI
HK
HL
HP
HX
I
1C
ID
J
JE
JG
JN
JQ
JS
JX
JY
K
KE
KT
KX
L
LF
25.2
25.7
33.3
24.2
27.7
26.4
24.3
22.4
28.0
25.2
21.0
30.4
27.7
33.3
25.0
27.3
25.6
23.5
27.1
25.2
26.5
20.0
28.5
4
25.3
24.0
32.0
24.2
27.2
27.3
23.4
22.0
34.0
26.3
24.7
30.4
27.6
30.6
27.1
27.6
25.7
23.5
27.0
28.2
26.9
21.0
28.0
Res. 3
24.6
24.1
34.9
23.3
27.2
25.7
24.7
22.7
27.0
27.5
23.4
30.4
26.6
33.4
24.6
27.3
30.0
23.8
27.1
27.1
28.2
20.0
27.1
= No data submitted
10.
Insufficient
data
x =
Exper.
Sigma
0.38
0.95
1.45
0.52
0.29
0.80
0.67
0.35
3.79
1.15
1.88
0.01
0.61
1.59
1.34
0.17
2.51
0.17
0.06
1.52
0.89
0.58
0.71
Rng anal
(R + SR) Average
0.138
0.335
0.571
0.177
0.098
0.315
0.256
0.138
1.720
0.453
0.728
0.000
0.217
0.551
0.492
0.059
0.866
0.059
0.020
0.591
0.335
0.197
0.276
-
25.03
24.60
33.40
23.90
27.37
26.47
24.13
'
22.37
29.67
26.33
23.03
30.40
27.30
32.43
25.57
27.40
27.10
23.60
27.07
26.83
27.20
20.33
27.87
TAG SYMBOLS
Determined
to be an
outlier
26/30
Normalized deviation
(grand-avg) (known) Tag
-0.75
-1.00
4.08
-1.40
0.60
0.08
-1.27
-2.29
1.92
0.00
-1.91
2.35
0.56
3.52
-0.44
0.62
0.44
-1.58
0.42
0.29
0.50
-3.46
0.89
IT = Above
-1.14
-1.39
3.70
-1.79
0.21
-0.31
-1.66
-2.68
1.54
-0.38
-2.29
1.96
0.17
3.14
-0.83
0.23
0.06
-1.96
0.04
-0.10
0.12
-3.85
0.50
control
li = Below control
*
tr
*
*
*
*
«
*
*
*
*
*
tr
«
«
*
u
*
*
limit
limit
-------
27/30
CRD-LV
Performance Evaluation: Blind-A, 17-Oct-1995
. ...- ... :x
Uranium (Natural)
Exper. Rng anal
Lab
LL
LR
LT
M
MA
MF
MP
MQ
MV
MY
N
NA
NH
NJ
NK
NO
NT
O
OF
OS
OX
OY
OZ
P
PA
PB
PG
PI
PM
PQ
PR
PV
PW
Q
QC
QJ
QP
QQ
QT
QU
QW
QX
QZ
RD
RF
=
0 =
Res. 1
22.8
28.1
26.0
27.4
27.0
25.5
27.8
21.3
26.8
30.8
26.7
27.5
24.5
23.8
28.6
25.0
26.9
20.1
14,7
25.7
24.9
Res. 2
25.5
28.7
28.0
25.0
28.0
26.3
25.2
23.2
26.8
29.5
27.1
27.4
25.1
19.2
29.5
25.6
26.9
22.3
15.9
26.4
24.4
Res. 3
X
27.6
27.7
28.0
28.7
29.0
27.1
27.8
23.0
26.5
30.3
27.0
27.8
25.7
22.9
30.2
21.4
26.8
19.0
15,8
26.3
25.3
No data submitted
Insufficient
data
x =
Sigma (R
2.41
0.50
1.15
1.88
1.00
0.80
1.50
1.04
0.17
0.66
0.21
0.21
0.60
2.44
0.80
2.27
0.06
1.68
0.67
0.38
0.45
+ SR)
0.945
0.197
0.394
0.728
0.394
0.315
0.512
0.374
0.059
0.256
0.079
0.079
0.236
0.906
0.315
0.827
0.020
0.650
0.236
0.138
0.177
Average
25.30
28.17
27.33
27.03
28.00
26.30
26.93
*
22.50
26.70
30.20
26.93
27.57
25.10
21.97
29.43
24.00
26.87
20.47
15,47
26.13
24.87
TAG SYMBOLS
Determined to be an outlier
Normalized deviation
(grand-avg) (known) Tag
-0.60
1.06
0.58
0.40
0.96
-0.02
0.35
-2.21
0.21
2.23
0.35
0.71
-0.71
-2.52
1.79
-1.35
0.31
-3.39
-6,27
-0.12
-0.85
IT s Above
II = Below
*
»
*
*,
*
*
-0.98
0.67
0.19
0.02
0.58
-0.40
*
-0.04
V
p~ ,
-2.60
*
-0.17
*
1.85
-0.04
*
0.33
-1.10
-2.91
1.40
-1.73
*
-0.08
*
M
-3.77 I).
*
-6.66 x
-0.50
-1.23
*
control limit
control limit
__ , j
-------
o
o
o
L_
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995
28/30
Uranium (Natural)
Lab
RG
RK
RP
RR
RU
RV
RZ
S
sc
SD
SF
SI
SL
SM
SN
SO
SR
ss
ST
sx
sz
T
TD
TG
TH
TI
TL
TN
TQ
TS
U
UA
UE
UK
UN
UP
UQ
uw
UY
VA
VC
VG
VH
=
j2i =
Res. 1
26.8
13.1
26.4
23.8
23.9
25.2
29.2
26.9
28.1
26.9
28.6
24.9
23.3
29.3
25.6
27.0
20.2
26.1
33.8
25.6
23.1
28.6
24.7
18.0
27.4
28.1
Res. 2
25.5
13.3
26.4
24.2
23.3
27.0
30.6
27.2
28.8
26.8
27.0
27.5
23.0
30.3
25.5
28.9
23.3
26.1
56.8
25.0
23.6
28.7
24.6
20.0
28.3
29.7
Res. 3
25.6
12.9
26.2
*
24.4
24.4
25.1
32.5
27.3
29.8
25.9
26.9
25.4
26.5
30.9
25.4
28.4
20.3
27.7
26.7
26.1
24.3
28.8
26.2
21.8
28.5
30.0
No data submitted
Insufficient
data
x =
Exper.
Sigma
0.72
0.20
0.12
0.31
0.55
1.07
1.66
0.21
0.85
0.55
0.95
1.38
1.94
0.81
0.10
0.98
1.76
0.92
15.73
0.55
0.60
0.10
0.90
1.90
0.59
1.02
Rng anal
(R + SR) Average
0.256
0.079
0.039
0.118
0.217
0.374
0.650
0.079
0.335
0.197
0.335
0.512
0.689
0.315
0.039
0.374
0.610
0.315
10.384
0.217
0.236
0.039
0.315
0.748
0.217
0.374
25.97
13.10
26.33
24.13
23.87
25.77
30.77
27.13
28.90
26.53
27,50
25.93
24.27
30.17
25.50
28.10
21.27
26.63
39.10
25.57
23.67
28.70
25.17
19.93
28.07
29.27
TAG SYMBOLS
Determined
to be an outlier
Normalized deviation
(grand-avg) (known) Tag
-0.21
-7.64
0.00
-1.27
-1.42
-0.33
2.56
0.46
1.48
0.12
0.67
-0.23
-1.19
2.21
-0.48
1.02
-2.93
0.17
7.37
-0.44
-1.54
1.37
-0.67
-3.69
1.00
1.69
ft = Above
JJ = Below
-0.60
-8.03
-0.38
-1.66
-1.81
-0.71
2.17
0.08
1.10
-0.27
0.29
-0.62
-1.58
1.83
-0.87
0.64
-3.31
-0.21
6.99
-0.83
-1.92
0.98
-1.06
-4.08
0.62
1.31
control
control
X
*
«
*
*
*
Ji
.
X
*
«
Jj.
»
*
,
,
limit
limit
-------
29/30 CRD-LV Performance Evaluation: Blind- A, 17-Oct-1995
Uranium (Natural)
Lab Res. 1 Res. 2
VI 27.8 27.3
W
VM
VO 26.3 27.4
VT
W 26.0 25.9.
WE
WF
WO
X 28.1 32.4
^^^^M^^Hi^MI
Exper.
Res. 3 Sigma
26.9 0.45
26.1 0.70
25.0 0.55
23.6 4.40
^^^^^MM
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known)
0.177 27.33 0.58 0.19
0.256 26.60 0.15 -0.23
0.197 25.63 -0.40 -0.79
2.395 28.03 0.98 0.60
Tag
m
9
m
i
*
*
^^^^
Data sorted by Laboratory Average
Average Tag
5.03 x
13.10 x
15.47 x
19.93 U
20.33 U
20.47 U
21.27 U
21.70 JJ.
21.97
22.37
22.50
23.03
23.20
23.53
23.60
23.67
23.67
23.87
23.90
23.97
24.00
24.13
24.13
24.27
24.33
24.60
24.63
24.80
24.87
24.90
25.00
25.03
s No data submitted
0 = Insufficient data
Lab
CO
RK
QX
UP
KT
QU
TD
AR
PW
FN
OY
HK
BB
DB
JN
TS
CJ
S
E
BG
QJ
RZ
ER
SS
CG
DT
AH
AW
RD
DE
A
DO
Average
25.10
25.17
25.30
25.50
25.50
25.57
25.57
25.63
25.67
25.77
25.77
25.93
25.97
26.00
26.13
26.27
26.30
26.33
26.33
26.33
26.47
26.53
26.60
26.63
26.70
26.83
26.87
26.93
26.93
26.93
27.03
27.03
Tag Lab
PV
UN
NA
sz
BN
TQ
ID
W
DI
SC
CA
SO
RG
BK
QZ
C
NT
RP
GQ
BO
EL
SL
VO
TI
P
JY
QQ
PG
OS
CE
NK
BC
Average Tag
27.07
27.10
27.10
27.13
27.17
27.20
27.30
27.33
27.33
27.37
27.40
27.50
27.50
27.57
27.60
27.87
28.00
28.03
28.07
28.10
28.17
28.53
28.70
28.77
28.90
29.23
29.27
29.43
29.67
29.77
29.77
30.10
Lab
JS
JE
AL
SF
BA
K
HP
VI
NJ
EB
J
SM
AK
PQ
BM
L
NO
X
UW
T
NH
AZ
U
BG
SI
AE
VH
Q
FZ
CX
CK
BH
TAG SYMBOLS ft s Above control limit
x = Determined
to be an outlier JJ- = Below control limit
-------
o
CRD-LV Performance Evaluation: Blind-A, 17-Oct-1995 30 /3(
Uranium (Natural)
Average Tag
30.17
30.20
30.40
^^^1^^
% responding labs
in. - _ _ _ _
-6
% responding labs
in. _ _ _ _ _ .
.XvS,
-6
Data sorted by Laboratory Average
Lab Average Tag Lab Average Tag La
SX
PB
HL
- -
30.60 AF 33.40 ft D2
30.77 SD 39.10 x TI
32.43 ft I 42.53 x CS
Frequency distribution
_
.!_-.._
-4 -2 0 +2 +4 +6
Normalized deviation of the mean from the known value
Frequency distribution
~" T
Ji
.__ m.l.linilil-i._H._
-4 -2 ' 6 +2 ' +4 ' +6
Normalized deviation of the mean from the grand average
o
o
s No data submitted
0 s Insufficient data
TAG SYMBOLS
x = Determined to be an outlier
ft s Above control limit
Ji s Below control limit
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