&EPA
United States
Environmental Protection
Agency
Environmental Monitoring
Systems Laboratory
P.O. Box 93478
Las Vegas NV 89193-3478
EPA/600/B-92/227
December 1992
Research and Development
Air Filter
Intercomparison Study
A Statistical Evaluation of
the August 28,1992 Data
S514QR92NRO.COV-3
-------
Air Filter
Intercomparison Study
August 28, 1992
Environmental Protection Agency
Environmental Monitoring Systems Laboratory
Las Vegas, Nevada
-------
UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
ENVIRONMENTAL MONITORING SYSTEMS LABORATORY-LAS VEGAS
P.O. BOX 93478
LAS VEGAS, NEVADA 89193-3478
(702/798-2100)
Dear Participant,
Enclosed are the results of the Nuclear Radiation Assessment Division (EMSL-LV)
Intercomparison Study for Air Filter; August 28, 1992.
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 Frank Novielli at 702/798-2159 or Patricia Honsa at 702/798-2141.
Sincerely,
Frank Novielli
Senior Chemist
Radioanalysis Branch
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 it has been approved for publication
as an EPA document.
-------
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug-1992 1/29
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.
-------
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug-1992
2/39
Alpha Statistical Summary 189 Participants
The known value of this nuclide is 30.0 pCi/F with an expected precision of 8.0; the control limits
are 16.1 to 43.9; the warning regions are 16.1 to 20.7 and 39.3 to 43.9
51(27.O %) Failed to respond ,
. ^ 2O(e3 5 %)
2(1.1 %) Outliers''
2(1.1 %) Out of control *'
but not an outlier
Statistic
a|| ||m|t9
Respondents
14(7.4 %) 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
31.25
6.10
37.20
19.52
4.17
0.21
30.00
0.00
0.00
Grand Avg 30.87
5.27
27.77
17.07
2.92
0.17
30.00
0.00
0.00
4(2.9 %) Mora than 3 norm. S.D.
14(10.1 %) Between 2 and 3 norm. S.O.
. 96(60.6 %) Within 1 norm. S.D.
of known value
24(17.4 %) Between 1 and 2 norm. S.D.
-------
3/29
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug-1992
Alpha
Lab
A
AA
AE
AF
AH
AI
AJ
AK
AL
AN
AP
AU
AZ
BA
BC
BG
BH
BI
BK
BL
BM
BO
BW
CA
CC
CC
CE
CJ
'«&*
CO
CP
CQ
CS
D
DD
DE
DG
DH
DI
DJ
DL
DM
DO
DP
DT
Res. 1
23.0
32.0
38.0
36.0
36.0
33.0
27.0
19.0
40.0
27.0
36.0
28.0
28.0
32.0
30.0
26.0
27.0
29.0
31.0
41.0
26.0
..
26.0
26.0
27.0
29.0
27.0
- >
28.0
40.0
34.0
38.0
30.0
30.0
25.0
32.0
35.0
29.0
37.0
34.0
27.0
28.0
Res. 2
22.0
30.0
40.0
37.0
33.0
32.0
28.0
17.0
40.0
29.0
31.0
28.0
29.0
33.0
28.0
25.0
26.0
28.0
33.0
42.0
27.0
'
26.0
29.0
28.0
29.0
28.0
*, , "' '''
28.0
37.0
29.0
40.0
31.0
29.0
25.0
34.0
36.0
24.0
36.0
35.0
28.0
30.0
Res. 3
22.0
33.0
38.0
38.0
' '
35.0
34.0
30.0
26.0
40.0
30.0
32.0
29.0
29.0
36.0
25.0
26.0
26.0
28.0
32.0
40.0
25.0
.• •*
25.0
24.0
27.0
32.0
27.0
\ / f
""ffff, d-*H X f
26.0
40.0
33.0
40.0
29.0
32.0
25.0
31.0
34.0
27.0
40.0
33.0
28.0
28.0
• & No data submitted
0 •
Insufficient
data
x =
Exper.
Sigma
0.58
1.53
1.15
1.00
1.53
1.00
1.53
4.73
0.00
1.53
2.65
0.58
0.58
2.08
2.52
0.58
0.58
0.58
1.00
1.00
1.00
//
0.58
2.52
0.58
1.73
0.58
' -,
1.15
1.73
2.65
1.15
1.00
1.53
0.00
1.53
1.00
2.52
2.08
1.00
0.58
1.15
Rng anal
(R + SR) Average
0.074
0.222
0.148
0.148
0.222
0.148
0.222
0.665
0.000
0.222
0.369
0.074
0.074
0.295
0.369
0.074
0.074
0.074
0.148
0.148
0.148
0.074
0.369
0.074
0.222
0.074
0.148
0.222
0.369
0.148
0.148
0.222
0.000
0.222
0.148
0.369
0.295
0.148
0.074
0.148
22.33
31.67
38.67
37.00
34.67
33.00
28:33
20.67
40.00
28.67
33.00
28.33
28.67
33.67
27.67
25.67
26.33
28.33
32.00
41.00
26.00
25.67
26.33
27.33
30.00
27.33
'
27.33
39.00
32.00
39.33
30.00
30.33
25.00
32.33
35.00
26.67
37.67
34.00
27.67
28.67
TAG SYMBOLS
Determined
to be an
outlier
Normalized deviation
(grand-avg) (known) Tag
-1.85
0.17
1.69
1.33
0.82
0.46
-0.55
-2.21
1.98
-0.48
0.46
-0.55
-0.48
0.60
-0.69
-1.13
-0.98
-0.55
0.24
2.19
-1.06
-1.13
-0.98
-0.77
-0.19
-0.77
-0.77
1.76
0.24
1.83
-0.19
-0.12
-1.27
0.32
0.89
-0.91
1.47
0.68
-0.69
-0.48
IT s Above
Jl s Below
-1.66
0.36
1.88
1.52
*
1.01
0.65
-0.36
-2.02
2.17
-0.29
0.65
-0.36
-0.29
0.79
-0.51
-0.94
-0.79
-0.36
0.43
2.38
-0.87
#• '.
-0.94
-0.79
-0.58
0.00
-0.58
*
-0.58
1.95
0.43
2.02
0.00
0.07
-1.08
0.51
1.08
-0.72
1.66
»
«
0.87
-0.51
-0.29
control limit
control limit
-------
EMSL-LV Intercomparison Study: Air Filter, 28-Aug-1992
Alpha
Lab Res. 1
DX
£
EA
EB
EH
EL
EW
EX
EZ
FE
FJ
FK
FL
FO
FZ
GE
GI
TTR
ffl
HL
I
IA
1C
IE
W
IY
J
JE
JG
JS
•JO
JY
K
KF
KH
KL
EM
KX
L
LA
LE
LF
LM
• =
0 •
28.0
33.0
26.0
34.0
28.0
35.0
46.0
42.0
27.0
40.0
37.0
35.0
32.0
33.0
21.0
53.0
33.0
31.0
32.0
40.0
27.0
42.0
40.0
>r.
34.0
31.0
28^0
25.0
59.0
28.0
29.0
32.0
30.0
Res. 2 Res. 3
27.0
, '
31.0
26.0
32.0
30.0
•'
'
32.0
50.0
39.0
28.0
42.0
39.0
29.0
32.0
38.0
23.0
' isfco
30.0
/ *
31.0
29.0
'
39.0
28.0
41.0
, ' -'*' ', ';,'rsf 'f
41.0
"" '- '','"-" t ,
32.0
31.0
26.0
25.0
59.0
26.0
27.0
33.0
33.0
26.0
34.0
24.0
35.0
27.0
'
-
36.0
48.0
45.0
27.0
42.0
35.0
36.0
29.0
35.0
21.0
5&0
30.0
'
30.0
32.0
39.0
26.0
39.0
/??'»<'
40.0
' *' ,
31.0
32.0
25.0
25.0
62.0
26.0
30.0
32.0
34.0
No data submitted
Insufficient
data
x =
Exper. Rng anal
Sigma (R + SR) Average
1.00
1.53
1.15
1.53
1.53
'
2.08
2.00
3.00
0.58
1.15
2.00
3.79
1.73
2.52
1.15
2.08
1.73
0.58
1.73
0.58
1.00
1.53
0.58
' '.
1.53
0.58
1.53
0.00
1.73
1.15
1.53
0.58
2.08
0.148
'
0.222
0.148
0.222
0.222
•'
0.295
0.295
0.443
0.074
0.148
0.295
0.517
0.222
0.369
0.148
0.295
0.222
0.074
0.222
0.074
0.148
0.222
0.074
..
0.222
0.074
0.222
0.000
0.222
0.148
0.222
0.074
0.295
27.00
-
32.67
25.33
33.67
28.33
'*
34.33
48.00
42.00
27.33
41.33
37.00
33.33
31.00
35.33
21.67
53.6?
31.00
,
30.67
31.00
39.33
27.00
40.67
40.33
32.33
31.33
26.33
25.00
60-00
26.67
28.67
32.33
32.33
TAG SYMBOLS
Determined
to be an
outlier
4/29
Normalized deviation
(grand-avg) (known) Tag
-0.84
•"
0.39
-1.20
0.60
-0.55
•'
0.75
3.71
2.41
-0.77
2.26
1.33
0.53
0.03
0.97
-1.99
4.93
0.03
-0.05
0.03
1.83
-0.84
2.12
2.05
0.32
0.10
-0.98
-1.27
6.31
-0.91
-0-48
0.32
0.32
ft = Above
II = Below
-0.65
*
0.58
-1.01
0.79
-0.36
*
•
0.94
3.90 ft
2.60
-0.58
2.45
1.52
0.72
*
0.22
1.15
-1.80
5.12 x
0.22
•
0.14
0.22
*
2.02
-0.65
2.31
2.24
•
0.51
0.29
-0.79
-1.08
•
*
6.50 x
-0.72
-0.29
0.51
0.51
•
control limit
control limit
-------
5/29
Alpha
Lab Res. 1
LR
LT
LZ
M
MA
ME
ML
MM
MP
MQ
MS
MV
N
NO
NH
NJ
NK
NO
NP
NT
JNV
NZ
O
OA
OB
OK
OL
OM
OQ
oz
p
PB
PC
PJ>
PE
PM
PP
PS
PU
PV
PW
Q
QA
QB
QC
• =
0 s
41.0
29.0
28.0
26.0
38.0
29.0
46.0
*
31.0
27.0
24.0
25.0
..
31.0
27.0
36.0
28.0
45.0
25.0
33.0
27.0
31.0
27.0
29.0
..
._
25.0
26.0
35.0
33.0
29.0
24.0
32.0
34.0
29.0
30.0
27.0
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug-1992
Res. 2
42.0
29.0
28.0
25.0
40.0
32.0
40.0
_,
35.0
29.0
23.0
26.0
,
30.0
26.0
39.0
29.0
44.0
26.0
*
35.0
28.0
29.0
32.0
29.0
?
f f
v f
23.0
26.0
37.0
29.0
30.0
26.0
35.0
30.0
28.0
26.0
27.0
Res. 3
42.0
29.0
29.0
27.0
39.0
30.0
47.0
••••
*
33.0
27.0
24.0
28.0
-
29.0
25.0
38.0
30.0
41.0
27.0
34.0
28.0
31.0
29.0
30.0
•*•''''
, '"',>•• ;•' , -
V -A,;- r-
23.0
26.0
37.0
35.0
25.0
25.0
34.0
32.0
29.0
31.0
30.0
No data submitted
Insufficient
data
X S
Exper.
Sigma
0.58
0.00
0.58
1.00
1.00
1.53
3.79
2.00
1.15
0.58
1.53
.-.-
1.00
1.00
1.53
1.00
2.08
1.00
1.00
0.58
1.15
2.52
0.58
••
",
;'' , -
1.15
0.00
1.15
A '•
3.06
2.65
1.00
1.53
2.00
0.58
2.65
1.73
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.074
0.000
0.074
0.148
0.148
0.222
0.517
0.295
0.148
0.074
0.222
..
0.148
0.148
0.222
0.148
0.295
0.148
0.148
0.074
0.148
0.369
0.074
0.148
0.000
0.148
0.443
0.369
0.148
0.222
0.295
0.074
0.369
0.222
41.67
29.00
28.33
26.00
39.00
30.33
44.33
••
33.00
27.67
23.67
26.33
..
30.00
26.00
37.67
29.00
43.33
26.00
34.00
27.67
30.33
29.33
29.33
23.67
26.00
36.33
32.33
28.00
25.00
33.67
32.00
28.67
29.00
28.00
TAG SYMBOLS
Determined
to be an
outlier
2.34
-0.41
-0.55
-1.06
1.76
-0.12
2.91
0.46
-0.69
-1.56
-0.98
-0.19
-1.06
1.47
-0.41
2.70
-1.06
0.68
-0.69
-0.12
-0.33
-0.33
-1.56
-1.06
1.18
0.32
-0.62
-1.27
0.60
0.24
-0.48
-0.41
-0.62
ft = Above
JJ. = Below
2.53
-0.22
-0.36
-0.87
1.95
0.07
3.10 ft
«
*
0.65
-0.51
-1.37
-0.79
*
0.00
-0.87
1.66
-0.22
2.89
-0.87
- *
0.87
-0.51
0.07
-0.14
*
-0.14
»
*
*
-1.37
-0.87
1.37
*
*
0.51
•
*
-0.43
-1.08
0.79
0.43
-0.29
-0.22
-0.43
control limit j
control limit J
-------
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug-1992
Alpha
Lab Res. 1
<#>
Qi
QJ
QM
QQ
QU
QW
QX
QZ
R
RA
BO
RG
RH
RJ
RK
RN
RO
RQ
HIS
RU
RW
S
SA
SC
SD
SI
SM
tff*'
••SQ:
SR
ss
ST
sw
SY
sz
T
TA
TB
TE
TG
TH
T*
• =
0 a
' f '
24.0
33.0
29.0
30.0
28.0
28.0
31.0
33.0
••
,
30.0
28.0
24.0
28.0
37.0
25.0
32.0
26.0
28.0
26.0
28.0
34.0
ff f f
';
f ff
36.0
29.0
, * *
25.0
29.0
37.0
33.0
33.0
24.0
Res. 2
-
15.0
31.0
29.0
••
33.0
28.0
28.0
32.0
33.0
-
'
32.0
29.0
24.0
24.0
39.0
28.0
32.0
f
f
24.0
28.0
28.0
30.0
32.0
^ '''.':•• '''i"'*" ,
' '• ,, ,, ' '#f,
" ' •''' ',;//' /
ff 'S ,"*• '*'? f f
36.0
28.0
•"
26.0
-
33.0
31.0
35.0
34.0
25.0
Res. 3
13.0
31.0
28.0
' ,
31.0
33.0
29.0
31.0
34.0
,
31.0
27.0
24.0
24.0
42.0
27.0
32.0
22.0
28.0
, ,'
27.0
31.0
32.0
// 1|^;
ivA',
'"''" '//"' '
38.0
28.0
27.0
28.0
32.0
33.0
31.0
25.0
No data submitted
Insufficient
data
X s
6/29 I]
Exper. Rng anal Normalized deviation
Sigma (R + SR) Average (grand- a vg) (known) Tag
-
5.86
1.15
0.58
1.53
2.89
0.58
0.58
0.58
.
+
1.00
1.00
0.00
2.31
2.52
1.53
0.00
2.00
0.00
1.00
1.53
1.15
/
.•X
' '
1.15
0.58
1.00
2.65
3.21
1.15
1.53
0.58
- , ,--
0.812
0.148
0.074
0.222
0.369
0.074
0.074
0.074
0.148
0.148
0.000
. 0.295
0.369
0.222
0.000
0.295
0.000
0.148
0.222
0.148
0.148
0.074
0.148
0.369
0.443
0.148
0.222
0.074
- -
17.33
31.67
28.67
31.33
29.67
28.33
31.33
33.33
31.00
28.00
24.00
25.33
39.33
26.67
32.00
24.00
28.00
27.00
29.67
32.67
, '
36.67
28.33
26.00
30.00
33.33
33.67
32.67
24.67
TAG SYMBOLS
Determined
to be an
outlier
~-, -,-,
-2.93
0.17
-0.48
0.10
-0.26
-0.55
0.10
0.53
0.03
-0.62
-1.49
-1.20
1.83
-0.91
0.24
-1.49
-0.62
-0.84
-0.26
0.39
'
1.25
-0.55
-1.06
-0.19
0.53
0.60
0.39
-1.34
It a Above
li = Below
*
-2.74
0.36
-0.29
•
0.29
-0.07
-0.36
0.29
0.72
*
*
0.22
-0.43
-1.30
-1.01
2.02
-0.72
0.43
»
•
-1.30
-0.43
•
-0.65
-0.07
0.58
*
*
*
1.44
-0.36
*•
-0.87
• |
0.00
0.72
'• •••?". *£;:;:
0.79
0.58
-1.15
*
control limit
control limit j
-------
7/29 EMSL-LV Intel-comparison Study: Air
Alpha
Lab Res. 1 Res. 2
TL 29.0 28.0
iili!l^S?^^st^P^ffiMS^^ff^^
•^g^^&}g&^M$&^?M8888%M$3?&S8
:-:-:- flnjCfc-X':-:-:-:-:-:-: •:->: -:tt
-------
Alpha
EMSL-LV Intel-comparison Study:
Air Filter,
28-Aug-1992
8/29
Data sorted by Laboratory Average
Average
33.00
33.33
33.33
33.33
33.67
33.67
33.67
33.67
34.00
34.00
34.33
34.67
35.00
Tag Lab
AJ
TA
R
FZ
TE
PW
EH
BC
NZ
DO
EZ
AI
DH
Average Tag
35.33
36.33
36.67
37.00
37.00
37.67
37.67
38.67
39.00
39.00
39.33
39.33
39.33
Lab
TTR
PC
SR
FO
AF
NK
DJ
AE
MA
CP
RN
IY
CS
Average Tag
40.00
40.33
40.67
41.00
41.33
41.67
42.00
42.00
43.33
44.33 tt
48.00 IT
53.67 x
60.00 x
Lab
AN
JS
JE
BM
FL
LR
TV
FJ
NP
ML
FE
HL
KX
% Frequency distribution of responding labs(expected prec. vs known value)
IO"
° -6
.•lllllllll
-4 exp.'prec. -2 ' lm^wn
value
I.
.••_
+2 exp. prec. +*
% Frequency distribution of responding labs(std. dev.
iu« - - - -
-6
_ |
.•llllllllll
-4 std.dev. -2 ' m-Jon
• s No data submitted
0 s Insufficient data
value
• _ _
vs mean value)
mm
+2 std.'dev. **
TAG SYMBOLS
x s Determined to be an outlier
IT = Above
U = Below
I ^^^^^^
control limit
control limit
-------
Beta
-
EMSL-LV Inter-comparison Study: Air Filter, 28-Aug-1992
Statistical Summary
9/29
189 Participants
o * 69*° PC1/F ^ ** e*Pected Precision of 10.0; the control limits
are 51.7 to 86.3; the warning regions are 51.7 to 57.4 and 80.6 to 86.3
50(26.5 %) Failed to respond .
7(3.7 %) Outliers '
3(1.6 %) Out of control
but not an outlier
Statistic
; 117(61.9 %) Within all limits
Respondents
•• 12(6.3 %) 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
72.79
11.62
134.92
15.96
5.49
0.33
72.00
4.35
0.26
Grand Avg 71.98
6.43
41.38
8.94
4.32
0.46
71.83
4.11
0.44
10(7.2 %) Mora than 3 norm. S.D.
12(8.6 %) Between 2 and 3 norm. S.D.
88(63.3 %) Within 1 norm. S.D.
of known value
29(20.9 %) Between 1 and 2 norm. S.D.
-------
10 /
29
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug-1992
Beta
Lab
A
AA
AE
AF
AH
AI
AJ
AK
AL
AN
AP
AU
AZ
BA
BC
BG
BH
BI
BK
BL
BM
BO
BW
CA
CC
CC
CE
CJ
CM
CO
CP
CQ
CS
D
DD
DE
DG
DH
BI
DJ
DL
DM
DO
DP
DT
Res. 1
70.0
68.0
64.0
73.0
66.0
70.0
74.0
66.0
74.0
74.0
73.0
66.0
69.0
70.0
61.0
72.0
77.0
71.0
71.0
78.0
63.0
69.0
72.0
72.0
74.0
70.0
60.0
69.0
73.0
69.0
70.0
75.0
74.0
74.0
73.0
100,0
71.0
70.0
86.0
69.0
Res. 2
70.0
69.0
63.0
72.0
64.0
69.0
72.0
69.0
72.0
74.0
73.0
65.0
69.0
68.0
60.0
72.0
76.0
70.0
72.0
79.0
65.0
70.0
73.0
74.0
75.0
69.0
/:::. ' .••*?.''
59.0
69.0
63.0
70.0
72.0
75.0
74.0
73.0
72.0
103.0
75.0
70.0
86.0
70.0
Res. 3
70.0
69.0
64.0
72.0
67.0
69.0
73.0
70.0
74.0
73.0
75.0
72.0
70.0
75.0
60.0
71.0
76.0
69.0
72.0
79.0
64.0
,
68.0
67.0
67.0
73.0
68.0
....... „ ,,;
57.0
68.0
71.0
72.0
71.0
75.0
74.0
72.0
70.0
10&D
73.0
71.0
84.0
66.0
• s No data submitted
0 •
Insufficient
data
X 3
Exper.
Sigma
0.00
0.58
0.58
0.58
1.53
0.58
1.00
2.08
1.15
0.58
1.15
3.79
0.58
3.61
0.58
0.58
0.58,
1.00
0.58
0.58
1.00
1.00
3.21
3.61
1.00
1.00
•••• ,/,
1.53
0.58
5.29
1.53
1.00
0.00
0.00
1.00
1.53
4.16
2.00
0.58
1.15
2.08
Rng anal
(R + SR)
0.000
0.059
0.059
0.059
H
0.177
0.059
0.118
0.236
0.118
0.059
0.118
0.413
0.059
0.413
0.059
0.059
0.059
0.118
0.059
0.059
0.118
0.118
0.354
0.413
0.118
0.118
_f
0.177
0.059
0.591
0.177
0.118
0.000
0.000
0.118
0.177
0.473
0.236
0.059
0.118
0.236
Normalized deviation
Average
70.00
68.67
63.67
72.33
65.67
69.33
73.00
68.33
73.33
73.67
73.67
67.67
69.33
71.00
60.33
71.67
76.33
70.00
71.67
78.67
64.00
69.00
70.67
71.00
74.00
69.00
•
58.67
68.67
69.00
70.33
71.00
75.00
74.00
73.00
71.67
103.33
73.00
70.33
85.33
68.33
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known) Tag
-0.34
-0.57
-1.44
0.06
-1.09
-0.46
0.18
-0.63
0.23
0.29
0.29
-0.75
-0.46
-0.17
-2.02
-0.05
0.75
-0:34
-0.05
1.16
-1.38
-0.52
-0.23
-0.17
0.35
-0.52
'
-2.31
-0.57
-0.52
-0.29
-0.17
0.52
0.35
0.18
-0.05
5.43
0.18
-0.29
2.31
-0.63
It s Above
II s Below
0.17
-0.06
-0.92
0.58
*
-0.58
0.06
0.69
-0.12
0.75
0.81
0.81
-0.23
0.06
0.35
-1.50
0.46
1.27
0.17
0.46
1.67
-0.87
»
0.00
0.29
0.35
0.87
0.00
*
-1.79
-0.06
0.00
0.23
0.35
1.04
0.87
0.69
0.46
«
5.95 x
0.69
0.23
2.83
*
-0.12
control limit
control limit
-------
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug
-1992
11/29
Beta
Lab
DX
BY
E
EA
EB
EF
EH
EL
EW
EX
EZ
FE
FJ
FK
FL
FO
FZ
GE
GI
FTR
HI
HL
I
IA
1C
IE
IU
IY
J
JE
«TCf'
JS
3V
JY
K
KF
KH
KL
KM
KX
L
LA
LE
LF
LM
• =
0 s
Res. 1
71.0
77.0
72.0
75.0
73.0
80.0
65.0
69.0
82.0
67.0
79.0
'
73.0
73.0
..
85.0
67.0
81.0
74.0
'
83.0
64.0
69.0
88.0
74.0
84.0
72.0
76.0
72.0
68.0
72.0
67.0
70.0
73.0
79.0
65.0
Res. 2
71.0
,
72.0
70.0
74.0
72.0
78.0
65.0
72.0
81.0
66.0
86.0
' ,
70.0
75.0
85.0
69.0
81.0
74.0
,
83.0
62.0
67.0
84.0
74.0
81.0
'i , ''
72.0
t .. f
f f *
75.0
75.0
66.0
72.0
67.0
74.0
72.0
79.0
67.0
Res. 3
69.0
69.0
70.0
74.0
73.0
•*
79.0
61.0
69.0
84.0
67.0
84.0
••
73.0
71.0
83.0
64.0
84.0
73.0
-
82.0
63.0
68.0
85.0
71.0
84.0
'/';';"'"', ',
73.0
,
76.0
79.0
63.0
73.0
68.0
71.0
69.0
76.0
68.0
No data submitted
Insufficient
data
X S
Exper.
Sigma
1.15
4.04
1.15
•
0.58
0.58
1.00
2.31
1.73
1.53
0.58
3.61
1.73
2.00
1.15
2.52
1.73
0.58
0.58
1.00
1.00
2.08
1.73
1.73
0.58
'
0.58
3.51
2.52
0.58
0.58
2.08
2.08
1.73
1.53
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.118
^
0.473
0.118
0.059
0.059
*
0.118
0.236
0.177
0.177
0.059
0.413
0.177
0.236
0.118
0.295
0.177
0.059
0.059
0.118
0.118
0.236
0.177
0.177
-
0.059
0.059
0.413
0.295
0.059
0.059
0.236
0.236
0.177
0.177
70.33
72.67
70.67
-
74.33
72.67
79.00
63.67
70.00
82.33
66.67
83.00
72.00
73.00
84.33
66.67
82.00
73.67
82.67
63.00
68.00
85.67
73.00
83.00
72.33
,
75.67
75.33
65.67
72.33
67.33
71.67
71.33
78.00
66.67
TAG SYMBOLS
Determined
to be an
outlier
-0.29
0.12
-0.23
0.41
0.12
1.22
-1.44
-0.34
1.79
-0.92
1.91
0.00
0.18
2.14
-0.92
1.74
0.29
1.85
-1.56
-0.69
2.37
0.18
1.91
0.06
0.64
0.58
-1.09
0.06
-0.80
-0.05
-0.11
1.04
-0.92
ft a Above
JJ s Below
0.23
•
0.64
0.29
*
0.92
0.64
*
1.73
-0.92
0.17
2.31
-0.40
2.42
•
0.52
0.69
•
2.66
-0.40
2.25
0.81
•"
2.37
-1.04
-0.17
2.89
0.69
2.42
*
0.58
•
1.15
1.10
-0.58
0.58
•
•
-0.29
0.46
0.40
1.56
-0.40
»
control limit
control limit
-------
12 /
29
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug-1992
Beta
Lab
LR
LT
LZ
M
MA
ME
Ml*
UN
MP
MQ
MS
MV
N
NO
NH
NJ
NK
NO
NP
NT
3SV
NZ
O
OA
OB
OK
OX*
OM
OQ
02
P
PB
PC
PH
PE
PM
PP
PS
PU
PV
PW
Q
QA
QB
QC
Res. 1
88.0
62.0
71.0
78.0
74.0
73.0
108.0
••
,
67.0
78.0
69.0
69.0
81.0
59.0
68.0
63.0
61.0
73.0
83.0
76.0
79.0
76.0
j.
-
73.0
70.0
73.0
84.0
75.0
68.0
70.0
57.0
75.0
73.0
93.0
Res. 2
89.0
62.0
73.0
78.0
74.0
74.0
mo
66.0
79.0
69.0
70.0
77.0
58.0
68.0
64.0
57.0
74.0
83.0
76.0
78.0
82.0
•'
f
*
70.0
70.0
73.0
f ' f"
79.0
76.0
67.0
80.0
58.0
75.0
72.0
90.0
Res. 3
86.0
62.0
73.0
79.0
71.0
73.0
116.0
,,
• -
63.0
82.0
67.0
72.0
83.0
51.0
70.0
65.0
57.0
75.0
-
83.0
75.0
77.0
76.0
' '
f f 'f
~ \ *
', ' ; n; ; ' ' •
-/'^ :/'"'""
69.0
71.0
73.0
ff
80.0
73.0
70.0
78.0
58.0
73.0
73.0
92.0
• = No data submitted
0 9
Insufficient
data
x s
Exper.
Sigma
1.53
0.00
1.15
0.58
1.73
0.58
&6JL
•• ' -
2.08
2.08
1.15
1.53
3.06
4.36
1.15
1.00
2.31
1.00
'
0.00
0.58
1.00
3.46
v
- ' f '
ff
2.08
0.58
0.00
.. f
2.65
1.53
1.53
5.29
0.58
1.15
0.58
1.53
Rng anal
(R + SR)
0.177
0.000
0.118
0.059
0.177
0.059
0.413
0.236
0.236
0.118
0.177
0.354
0.473
0.118
0.118
0.236
0.118
0.000
0.059
0.118
0.354
0.236
0.059
0.000
0.295
0.177
0.177
0.591
0.059
0.118
0.059
0.177
Normalized deviation
Average
87.67
62.00
72.33
78.33
73.00
73.33
m.0o
65.33
79.67
68.33
70.33
80.33
56.00
68.67
64.00
58.33
74.00
83.00
75.67
78.00
78.00
-
70.67
70.33
73.00
81.00
74.67
68.33
76.00
57.67
74.33
72.67
91.67
TAG SYMBOLS
Determined
to be an outlier
(grand-avg) (known) Tag
2.72
-1.73
0.06
1.10
0.18
0.23
6.93
-1.15
1.33
-0.63
-0.29
1.45
-2.77
-0.57
-1.38
-2.36
0.35
1.91
0.64
1.04
1.04
-0.23
-0.29
0.18
1.56
0.47
-0.63
0.70
-2.48
0.41
0.12
3.41
It = Above
U s Below
3.23 It
-1.21
0.58
1.62
0.69
0.75
7.46 X
*
+
-0.64
1.85
-0.12
0.23
*
1.96
-2.25
-0.06
-0.87
-1.85
0.87
•
2.42
1.15
1.56
1.56
*
«
»
*
»,
0.29
0.23
0.69
*
»
2.08
«
»
0.98
-0.12
1.21
-1.96
0.92
0.64
3.93 ft
control limit
control limit
-------
EMSL-LV Intel-comparison Study : Air Filter, 28-Aug-1992
13/29
Beta
Lab
QI
QJ
QK
QM
QQ
QU
QW
QX
QZ
R
RA
EC
RG
RH
RJ
RK
RN
RO
RQ
EU
RW
S
SA
SC
SD
tifift
CSJ?-
SI
SM
8Q
SR
ss
ST*
, sw
sz
T
TA
TB
TE
TG
TH
TI
• =
0 a
Res. 1
21,0
68.0
64.0
72.0
74.0
76.0
80.0
72.0
f
77.0
67.0
70.0
51.0
68.0
82.0
76.0
'
72.0
76.0
60.0
73.0
73.0
'
' ' "-.
'*07,0^'
78.0
410
67.0
75.0
80.0
156.0
70.0
77.0
Res. 2
11.6
72.0
69.0
68.0
72.0
75.0
84.0
73.0
'
77.0
68.0
71.0
52.0
68.0
84.0
76.0
-
71.0
75.0
56.0
76.0
70.0
f ^
-'- " "!/
'' 100.0
78.0
40.0
68.0
74.0
75.0
mo
70.0
75.0
Res. 3
11.0
56.0
69.0
70.0
68.0
77.0
77.0
73.0
77.0
70.0
71.0
51.0
71.0
82.0
76.0
72.0
72.0
61.0
76.0
73.0
""'•-. j •• ' f f
t",*^^^
,'. '-!\i*&
78.0
40.0
65.0
73.0
75.0
135,0
69.0
76.0
No data submitted
Insufficient
data
X 5
Exper.
Sigma
6.Y7
8.33
2.89
2.00
3.06
1.00
3.51
0.58
4
0.00
1.53
0.58
0.58
1.73
1.15
0.00
-
0.58
2.08
2.65
1.73
1.73
/ ' "
» '' ' *
«.02
0.00
o.sa •
1.53
1.00
2.89
2,08
0.58
1.00
Rng anal
(R + SR)
-------
14/29 EMSL-LV Intel-comparison Study: Air
Beta
Lab Res. 1 Res. 2
TK
TL 70.0 68.0
18
TV 104.0 101.0
TW
X 68.0 65.0
Y 69.0 61.0
Z 73.0 73.0
Exper. Rng anal
Res. 3 Sigma (R + SR)
* *
67.0 1.53 0.177
10$.$ 1*53 0.177
..
60.0 4.04 0.473
68.0 4.36 0.473
70.0 1.73 0.177
Filter, 2 8- Aug. 1992
Normalized deviation
Average (grand-avg) (known)
68.33 -0.63 -0.12
102,33 &28 0.77
'
64.33 -1.32 -0.81
66.00 -1.04 -0.52
72.00 0.00 0.52
Tag
*•
*
x
#
Data sorted by Laboratory Average
Average Tag
14.33 x
40.33 x
51.33 U
56.00
57.67
58.33
58.67
59.00
60.33
62.00
63.00
63.67
63.67
64.00
64.00
64.33
65.33
65.33
65.67
65.67
66.00
66.67
66.67
66.67
66.67
67.33
67.33
67.67
68.00
68.33
68.33
68.33
68.33
• s No data submitted
0 s Insufficient data
Lab Average Tag
QI 68.33
SW 68.33
RK 68.67
NJ 68.67
Q 68.67
NP 69.00
CO 69.00
SC 69.00
BG 69.00
LT 69.33
IE 69.33
EZ 69.67
AE 70.00
NO 70.00
BO 70.00
X 70.00
QJ 70.33
MQ 70.33
KF 70.33
AI 70.33
Y 70.33
T 70.67
LF 70.67
HI 70.67
FK 70.67
QM 71.00
KX 71.00
AZ 71.00
IU 71.33
TL 71.33
RH 71.67
PV 71.67
MV 71.67
TAG SYMBOLS
Lab Average Tag
DT 71.67
AL 71.67
NK 72.00
CP 72.00
AA 72.00
RN 72.33
CQ 72.33
CJ 72.33
CA 72.33
BA 72.67
AJ 72.67
TG 72.67
QU 72.67
FE 73.00
BK 73.00
A 73.00
PB 73.00
N 73.00
DX 73.00
DM 73.00
CS 73.33
RJ 73.33
P 73.67
EB 73.67
CC 73.67
D 74.00
CC 74.00
BC 74.00
QW 74.00
LA 74.33
RW 74.33
L 74.33
DH 74.67
ft = Above control
x = Determined to be an outlier $ = Below control
Lab
BL
BH
Z
SI
FZ
LZ
KH
JS
AF
R
QB
EL
EA
PC
MA
J
GE
DL
DG
AK
ME
AN
I
AU
AP
TA
NT
DE
CE
S
QA
EH
PU
limit
limit
-------
EMSL>LV Intel-comparison Study: Air Filter, 28-Aug-1992
Beta
15/29 1
Data sorted by Laboratory Average
Average Tag Lab
75.00 SD
75.00 DD
75.33 K
75.67 O
75.67 JY
76.00 TH
76.00 RQ
76.00 QX
76.00 PW
76.33 BI
76.67 TB
77.00 RG
78.00 SS
Average Tag Lab Average Tag
78.00 OB 82.67
78.00 OA 83.00
78.00 LE 83.00
78.33 M 83.00
78.67 BM 84.33
79.00 EX 85.33
79.67 MS 85.67
80.33 QZ 87.67 1t
80.33 NH 91.67 It
81.00 PM 102.33 x
82.00 . HL 103.33 x
82.33 FJ 107.67 x
82.67 RO 112.00 x
136.67 x
Lab
1C
NZ
JE
FL
WR
DO
IY
LR
QC
TV
DJ
SR
ML
TE
% Frequency distribution of responding labs( expected prec. vs known value)
10 ••!•!•
__._ ..I.IIIIIIII-I-. I . _ _
m
•« "* exp. prec. -2 known exp. prec. +4 +*
value
% Frequency distribution of responding labs(std. dev. vs mean value)
10* ----------------
ITlt.i
. — •-•.mini.!..-!.-- _ _
-a ' -4 std.'dev. -2 ' 6 ' +'2 8td.'dev. +4
• 3 No data submitted
0 3 Insufficient data
mean
value
TAG SYMBOLS It = Above
x 3 Determined to be an outlier JJ 3 Below
m
+6
control limit
control limit
-------
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug-1992
16/29
Strontium 90 Statistical Summary 189 Participants
The known value of this nuclide is 25.0 pCi/F with an expected precision of 5.0; the control limits
are 16.3 to 33.7; the warning regions are 16.3 to 19.2 and 30.8 to 33.7
109(57.7 %) Failed to respond ,
2(1.1 %) Outliers —"
Statistic
. 75(39.7 %) Within all limits
Respondents
* 3(1.6 %) 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
25.24
7.61
57.93
30.15
0.97
0.03
24.33
-2.67
-0.09
Grand Avg 24.31
2.80
7.85
11.53
-2.77
-0.25
24.33
-2.67
-0.24
2(2.5 %) More than 3 norm. S.D. »„
3(3.8 %) Between 2 and 3 norm. S.D.
54(67.5 %) Within 1 norm. S.D.
of known value
21(26.3 %) Between 1 and 2 norm. S.D.
-------
17 /
29
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug-1992
Strontium 90
Lab
A
AA
AE
AF
AH
AI
AJ
AK
AL
AN
AF
All
AZ
BA
BC
BG
BH
BI
BK
BL
BM
BO
BW
CA
CO
CE
CJ
j**t**w
CO
CQ
CS
D
DD
DE
DG
DH
DI
DJ
DM
DO
DP
&?
Res. 1
25.0
25.0
25.0
22.0
25.0
29.0
,
25.0
5.0
32.0
25.0
-
24.0
26.0
24.0
28.0
'
22.0
24.0
22.0
21.0
23.0
20.0
26.0
26.0
84.0
26.0
Res. 2 Res. 3
24.0
21.0
25.0
22.0
23.0
24.0
'
22.0
23.0
25.0
25.0
22.0
26.0
23.0
26.0
*
22.0
23.0
25.0
22.0
23.0
20.0
25.0
26.0
$7.0
24.0
,
'
24.0
25.0
25.0
'
22.0
-
26.0
26.0
18.0
22.0
31.0
23.0
22.0
26.0
24.0
24.0
-
24.0
18.0
23.0
23.0
25.0
21.0
25.0
23.0
8&0
••
26.0
• s No data submitted
0 s
Insufficient
data
X 3
Ezper. Rng anal Normalized deviation
Sigma (R
0.58
2.31
•"
0.00
0.00
..
1.53
2.52
3.51
10.12
3.79
1.15
1.15
0.00
0.58
2.00
1.15
3.21
1.53
1.00
1.15
0.58
0.58
1.73
,.2.52
1.15
+ SR) Average
0.118
0.473
0.000
0.000
f
0.354
0.591
0.827
3.146
0.827
0.236
0.236
0.000
0.118
0.473
0.236
0.709
0.354
0.236
0.236
0.118
0.118
0.354
0,591
0.236
24.33
23.67
25.00
22.00
24.67
26.33
..
21.67
16.67
29.33
24.33
22.67
26.00
23.67
26.00
•'
22.67
21.67
23.33
22.00
23.67
20.33
25.33
25.00
86.67
25.33
TAG SYMBOLS
Determined to
bean
outlier
(grand-avg) (known) Tag
0.01
-0.22
*'
0.24
-0.80
0.12
0.70
-0.91
-2.65
1.74
0.01
-0.57
0.59
-0.22
0.59
-0.57
-0.91
-0.34
-0.80
-0.22
-1.38
0.36
0.24
21.60
0.36
ft s Above
U s Below
-0.23
-0.46
«
0.00
*
-1.04
»
-0.12
0.46
»
«
*
-1.15
-2.89
1.50
-0.23
»
*
«
-0.81
0.35
-0.46
»
0.35
*
* ;
-0.81
# •
-1.15
-0.58
-1.04
-0.46
-1.62
0.12
0.00
•
21.36 x
«
0.12
*
control limit
control limit
-------
EMSL-LV Intercomparison Study: Air Filter, 28-Aug-
•1992
18/29
Strontium 90
Lab
E
EA
EB
EF
EH
EL
JEW
Wt
EZ
FE
FJ
FK
FL
FO
FZ
GE
HP!
HI
ttf.
I
1A
1C
EE
W
J
JE
JS
JO
JY
K
KF
KH
KL
KM
KX
L
LA
LE
LF
LM
Res. 1
24.0
24.0
24.0
24.0
f .•
27.0
25.0
23.0
27.0
21.0
..
34.0
'
'
'
25.0
,
27.0
18.0
30.0
•* f ' ' ••"
21.0
05.0
25.0
23.0
21.0
'
Res. 2 Res. 3
' f f
25.0
21.0
'
26.0
24.0
'
25.0
25.0
22.0
26.0
'
24.0
33.0
f
f
s
'>
25.0
_,
-• ''"',
27.0
20.0
' , ' ' '
25.0
ff ' fff'
23.0
57,0
•*
25.0
22.0
24.0
25.0
24.0
,
26.0
23.0
'*
_,
28.0
25.0
26.0
26.0
.
23.0
33.0
,
24.0
-
27.0
22.0
'(' '/
26.0
21.0
mo
23.0
22.0
21.0
• = No data submitted
0 s
Insufficient
data
x =
Exper.
Sigma
0.58
•"
1.73
1.15
0.58
f
1.53
0.00
2.08
0.58
1.53
0.58
-
0.58
- -
0.00
2.00
2.65
1.15
1.53
1.15
0.58
1.73
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.118
0.354
0.236
0.118
'•'
0.354
0.000
0.473
0.118
0.354
0.118
0.118
0.000
0.473
0.591
0.236
0.304
0.236
0.118
0.354
24.67
23.00
25.33
23.67
•'
26.67
25.00
23.67
26.33
22.67
33.33
-
24.67
27.00
20.00
27.00
21.67
36.67
24.33
22.33
22.00
TAG SYMBOLS
Determined
to be an
outlier
0.12
-0.45
f
0.36
-0.22
0.82
0.24
-0.22
0.70
-0.57
3.13
0.12
0.93
-1.49
0.93
-0.91
4.28
0.01
-0.68
-0.80
IT s Above
Ji = Below
-0.12
•
-0.69
*
0.12
-0.46
.
0
0.58
0.00
-0.46
0.46
*
, »,
-0.81
*
2.89
•
*
•
- •
-0.12
; •'
*
0.69
-1.73
*
0.69
•
-1.15
4.04 x
•
-0.23
-0.92
•
-1.04
•
•
•
•
•
control limit
control limit
-------
197
29
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug-1992
Strontium 90
Lab
LR
LT
LZ
M
MA
ME
ML
MN
MP
MQ
MS
MV
N
NC
NH
NJ
NK
NO
NP
NV
0
OA
OB
OK
OL
OM
OQ
oz
F
PB
PC
PE
PM
PP
PS
FU
PV
PW
Q
QA
QB
90
• =
0 s
Res. 1
32.0
22.0
27.0
25.0
'
26.0
26.0
28.0
21.0
24.0
22.0
,
•f •'
25.0
23.0
%
19.0
27.0
19.0
30.0
20.0
Res. 2 Res. 3
34.0
22.0
27.0
27.0
-
26.0
26.0
f
31.0
'
19.0
25.0
.
22.0
,,, , , „ ,,,„,,,..•
, 'V-'
> .>' ' '' V-
'?""'',,-
25.0
22.0
f •* _. f f
19.0
26.0
22.0
26.0
21.0
33.0
22.0
28.0
28.0
26.0
26.0
26.0
18.0
-
25.0
/
24.0
_.
f _.
,V .
•••• •,. '...
25.0
23.0
21.0
25.0
21.0
25.0
22.0
No data submitted
Insufficient
data
X 3
Exper.
Rng anal Normalized deviation
Sigma (R + SR) Average (grand-avg) (known) Tag
1.00
0.00
0.58
1.53
0.00
0.00
2.52
1.53
0.58
'
1.15
.- ' ' "
f .
0.00
0.58
-
1.15
1.00
1.53
2.65
1.00
0.236
0.000
0.118
0.354
0.000
0.000
<;
0.591
0.354
0.118
0.236
•"
0.000
0.118
0.236
0.236
0.354
0.591
0.236
33.00
22.00
27.33
26.67
26.00
26.00
28.33
'
19.33
24.67
22.67
•'•'
25.00
22.67
19.67
26.00
20.67
27.00
21.00
TAG SYMBOLS
Determined
to be an
outlier
3.01
-0.80
1.05
i
0.82
0.59
0.59
1.39
-1.72
0.12
-0.57
0.24
-0.57
-1.61
0.59
-1.26
0.93
-115
ft = Above
•IL = Below
2.77
-1.04
«
0.81
*
0.58
»
4
»
0.35
0.35
»
*
«
»
1.15
*
*
-1.96
*
.
-0.12
»
*
-0.81
» :
«
*
*
0.00
-0.81
I
-1.85
0.35
*
•
-1.50
0.69
-1.39
*
*
control limit
control limit
-------
EMSL-LV Intel-comparison Study : Air Filter, 28-Aug-1992
Strontium 90
Lab Res. 1
<#>
QJ
QIC
QM
QQ
QU
QW
QZ
R
RA
RC
RG
RH
RK
RN
RO
RS
m?
RW
8
SA
sc
80
SI
SM
SP
S3
' sit
ss
sn*
sw
SY
sz
T
TA
TB
TE
TO
TK
TI
• =
0 3
-
22.0
24.0
25.0
25.0
24.0
22.0
26.0
24.0
26.0
25.0
••
21.0
,, ••
25.0
'
', ?'<
24.0
24.0
24.0
23.0
29.0
Res. 2 Res. 3
"
23.0
24.0
26.0
25.0
24.0
22.0
27.0
••
25.0
25.0
21.0
23.0
' •" f
25.0
*
f $
, ' > ~; ,- ; ,
24.0
25.0
'
23.0
23.0
31.0
V-
18.0
24.0
24.0
25.0
25.0
22.0
25.0
••••
26.0
25.0
21.0
22.0
25.0
,
'* * ..
' '
""
25.0
25.0
25.0
24.0
30.0
No data submitted
Insufficient
data
x =
20/29
Exper. Rng anal Normalized deviation
Sigma (R + SR) Average (grand-avg) (known) Tag
-
2.65
0.00
1.00
0.00
0.58
0.00
1.00
*
1.00
0.58
2.31
1.00
0.00
'
0.58
0.58
1.00
0.58
1.00
•
0.591
0.000
0.236
0.000
0.118
0.000
0.236
0.236
0.118
0.473
0.236
0.000
0.118
0.118
0.236
0.118
0.236
-
21.00
-
24.00
25.00
25.00
24.33
22.00
26.00
25.00
25.33
22.33
22.00
25.00
24.33
24.67
24.00
23.33
30.00
TAG SYMBOLS
Determined
to be an
outlier
'
-1.15
-0.11
0.24
0.24
0.01
-0.80
0.59
0.24
0.36
-0.68
'
'
-0.80
0.24
0.01
0.12
-0.11
-0.34
1.97
ft s Above
li s Below
*
-1.39
*
-0.35
*
0.00
0.00
-0.23
-1.04
0.35
*
*
0.00
0.12
-0.92
•
. *
«
,•
•
'•
-1.04 ^
*
0.00
•
*
*
•
-0.23
*
-0.12
•
•
-0.35
-0.58
•
1.73
*
*
•
control limit
control limit
-------
21/29 EMSL-LV Intel-comparison Study: Air
Strontium 90
Lab Res. 1 Res. 2
TK
TL 34.0 27.0
TP
TS
fW
X 23.0 22.0
y
Z 23.0 24.0
Exper. Rng anal
Res. 3 Sigma (R + SR)
^
30.0 3.51 0.827
20.0 1.53 0.354
24.0 0.58 0.118
Filter, 28- Aug. 1992
Normalized deviation
Average (grand-avg) (known)
30.33 2.09 1.85
21.67 -0.91 -1.15
23.67 -0.22 -0.46
' — *\
Tag
*
«
»
«
*
Data sorted by Laboratory Average
Average Tag
16.67
19.33
19.67
20.00
20.33
20.67
21.00
21.00
21.67
21.67
21.67
21.67
22.00
22.00
22.00
22.00
22.00
22.00
22.33
22.33
22.67
22.67
22.67
22.67
22.67
23.00
• s No data submitted
0 = Insufficient data
Lab
BA
NP
PM
JE
DE
PV
QJ
Q
X
JY
CQ
AZ
sc
R
LT
KX
D
AI
RN
KL
PC
OL
FZ
CJ
BL
EB
Average Tag
23.33
23.33
23.67
23.67
23.67
23.67
23.67
23.67
24.00
24.00
24.33
24.33
24.33
24.33
24.33
24.67
24.67
24.67
24.67
24.67
25.00
25.00
25.00
25.00
25.00
25.00
25.00
TAG SYMBOLS
Lab
TA
CS
Z
FJ
EL
DD
BO
AA
T
QM
SS
QZ
KH
BG
A
SW
OA
1C
E
AK
SI
RH
QW
QU
PB
FE
DH
Average Tag
25.00
25.33
25.33
25.33
25.33
26.00
26.00
26.00
26.00
26.00
26.00
26.33
26.33
26.67
26.67
27.00
27.00
27.00
27.33
28.33
29.33
30.00
30.33
33.00
33.33
36.67 x
86.67 x
It = Above control
x s Determined to be an outlier & = Below control
Lab
AF
RK
EH
DO
DG
RA
PP
MS
MQ
CA
BM
FK
AL
ME
EZ
PW
JS
J
M
NJ
BC
TE
TL
LR
HE
K
DJ
limit
limit
-------
EMSL-LV Intel-comparison Study: Air Filter, 2S-Aug-1992
22/29
Strontium 90
Frequency distribution of responding labs(expected prec. vs known value)
10
-6
-4 exp.prec. -2 known +2 exp'prec' **
value
Frequency distribution of responding labs(std. dev. vs mean value)
•4 std. dev. -2
.mean
value
+2 std. dev.
-------
EMSL-LV Intel-comparison Study: Air Filter, 28-Aug-1992
23/29
Cesium 137 Statistical Summary 189 Participants
The known value of this nuclide is 18.0 pCi/F with an expected precision of 5.0; the control limits
are 9.3 to 26.7; the warning regions are 9.3 to 12.2 and 23.8 to 26.7
58(30.7 %) Failed to respond -,
5(2.6 %) Outliers •*
2(1.1 %) Out of control •'
but not an outlier
Statistic
118(62.4 %) Within all limits
Respondents
•• 6(3.2 %) 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
235.16
1954.83
3821351.09
831.29
1206.42
0.11
19.67
9.26
0.00
Grand Avg 19.68
2.94
8.62
14.92
9.32
0.57
19.67
9.26
0.57
7(5.3 %) More than 3 norm. S.D. -.
6(4.6 %) Between 2 and 3 norm. S.D.
86(65.6 %) Within 1 norm. S.D.
of known value
32(24.4 %) Between 1 and 2 norm. S.D.
-------
247
29
EMSL-LV Intel-comparison Study : Air Filter, 28-Aug-1992
Cesium 137
Lab
A
AA
AE
AF
AH
AI
AJ
AK
AL
AN
AP
AU
AZ
BA
BC
BG
BH
BI
BK
BL
BM
BO
BW
CA
C€>
oc
CE
CJ
CM
CO
CP
CQ
CS
D
DD
DE
DG
DH
DI
8J
DL
DM
DO
DP
DT
Res. 1
19.0
18.0
22.0
24.0
20.0
17.0
23.0
17.0
23.0
22.0
22.0
22.0
20.0
17.0
20.0
18.0
13.0
17.0
19.0
18.0
16.0
15.0
14.0
'
22.0
20.0
23.0
17.0
20.0
19.0
17.0
22.0
18.0
6157,0
21.0
18.0
22.0
18.0
Res. 2
20.0
18.0
21.0
24.0
18.0
17.0
21.0
20.0
25.0
19.0
20.0
17.0
19.0
18.0
24.0
18.0
18.0
18.0
21.0
17.0
16.0
15.0
18.0
,
23.0
21.0
25.0
17.0
20.0
21.0
18.0
24.0
19.0
€809.0
21.0
18.0
22.0
19.0
Res. 3
19.0
18.0
21.0
21.0
21.0
17.0
23.0
22.0
24.0
18.0
18.0
18.0
20.0
18.0
19.0
17.0
18.0
17.0
22.0
20.0
'
16.0
-
16.0
18.0
< -', i, >•
18.0
19.0
22.0
18.0
20.0
20.0
18.0
20.0
18.0
0N&&
22.0
18.0
22.0
17.0
• = No data submitted
0 s
Insufficient
data
x =
Exper.
Sigma
0.58
0.00
0.58
1.73
1.53
0.00
1.15
2.52
1.00
2.08
2.00
2.65
0.58
0.58
2.65
0.58
2.89
0.58
1.53
1.53
0.00
0.58
2.31
'
2.65
1.00
1.53
0.58
0.00
1.00
0.58
2.00
0.58
27,46
0.58
0.00
0.00
1.00
Rnganal
(R + SR)
0.118
0.000
0.118
0.354
0.354
0.000
0.236
0.591
0.236
0.473
0.473
0.591
0.118
0.118
0.591
0.118
0.591
0.118
0.354
0.354
0.000
0.118
0.473
0.591
0.236
0.354
0.118
0.000
0.236
0.118
0.473
0.118
10.796
0.118
0.000
0.000
0.236
Average
19.33
18.00
21.33
23.00
19.67
17.00
22.33
19.67
24.00
19.67
20.00
19.00
19.67
17.67
21.00
17.67
16.33
17.33
20.67
18.33
16.00
15.33
16.67
21.00
20.00
23.33
17.33
20.00
20.00
17.67
22.00
18.33
671&00
21.33
18.00
22.00
18.00
TAG SYMBOLS
Determined
to be an outlier
Normalized
(grand-avg)
-0.12
-0.58
0.57
1.15
0.00
-0.93
-
0.92
0.00
1.50
0.00
0.11
-0.23
0.00
-0.70
0.46
-0.70
-1.16
-0.81
0.34
-0.47
-1.27
-1.50
-1.04
0.46
0.11
1.27
-0.81
0.11
0.11
-0.70
0.80
-0.47
2341.15
0.57
-0.58
0.80
-0.58
deviation
(known) Tag
0.46
0.00
1.15
1.73
0.58
-0.35
»
1.50
0.58
2.08
0.58
0.69
0.35
0.58
-0.12
1.04
-0.12
-0.58
«
-0.23
0.92
0.12
» ;
-0.69
*
- *
-0.92
-0.46
*
1.04
0.69
1.85
-0.23
0.69
0.69
-0.12
1.39
0.12
«
2341.73 x
1.15
0.00
1.39
*
0.00
IT s Above control limit
U 3 Below control limit
-------
EMSL-LV Intercomparison Study: Air Filter, 28-Aug-1992
Cesium 137
Lab Res. 1
DX
BY
E
EA
EB
""tftff
EH
EL,
EW
EX
FE
FJ
FK
FL
FZ
GE
GI
HT5
ffl
HL
I/
1C
IE
IU
1ST
J
JE
JS
JY
K
KF
KH
KL
KM
KX
L
LA
LE
LF
LM
• =
0 9
.. f f
- -
20.0
19.0
19.0
20.0
18.0
,,
22.0
21S87.0;
22.0
19.0
17.0
21.0
16.0
22.0
20.0
17.0
16.0
18.0
21.0
19.0
', ?' ',',
18.0
19.0
'- ;- '* \- --',
19.0
18.0
2:0 -
19.0
24.0
19.0
21.0
18.0
20.0
26.0
21.0
Res. 2
f
'
18.0
19.0
18.0
,
20.0
17.0
24.0
19807,0
21.0
18.0
17.0
22.0
16.0
21.0
20.0
18.0
16.0
16.0
; '
21.0
' <•
20.0
18.0
19.0
23.0
16.0
'-,- "' &0
''
20.0
25.0
20.0
22.0
19.0
19.0
27.0
22.0
Res. 3
,
..
19.0
19.0
18.0
..
18.0
18.0
*•
21.0
22610.0
21.0
19.0
18.0
25.0
17.0
21.0
.20.0
18.0
17.0
16.0
'
21.0
j f f * ff f
/ 21.0
'' ''
17.0
19.0
"/',;i ' , £,•",,
22.0 f
18.0
SLO
20.0
28.0
19.0
21.0
18.0
20.0
25.0
21.0
No data submitted
Insufficient
data
X 3
Exper.
Sigma
f
f
1.00
0.00
0.58
1.15
0.58
, ,
1.53
1416,43
0.58
0.58
0.58
2.08
0.58
0.58
0.00
0.58
0.58
1.15
0.00
1.00
,
0.58
0.00
2.08
1.15
0.00
0.58
2.08
0.58
0.58
0.58
0.58
1.00
0.58
Rnganal
(R + SR)
; >
0.236
0.000
0.118
0.236
0.118
.•
0.354
607J14
0.118
0.118
0.118
0.473
0.118
0.118
0.000
0.118
0.118
0.236
0.000
0.236
0.118
0.000
0.473
0.236
0.000
0.118
0.473
0.118
0.118
0.118
0.118
0.236
0.118
Average
'
19.00
19.00
18.33
19.33
17.67
..
22.33
21401.33
21.33
18.67
17.33
22.67
16.33
21.33
20.00
17.67
16.33
16.67
21.00
20.00
.-
17.67
19.00
21.33
17.33
2.00
19.67
25.67
19.33
21.33
18.33
19.67
26.00
21.33
TAG SYMBOLS
Determined
to be an outlier
Normalized
(grand-avg)
S
"- '
-0.23
-0.23
-0.47
-0.12
-0.70
f
0.92
7406.82
0.57
-0.35
-0.81
1.04
-1.16
0.57
0.11
-0.70
-1.16
-1.04
0.46
0.11
,
-0.70
-0.23
0.57
-0.81
-6.12
0.00
2.07
-0.12
0.57
-0.47
0.00
2.19
0.57
26/29
deviation
(known) Tag
•
, •
0.35
0.35
0.12
*
0.46
-0.12
*
1.50
7407.40 X
1.15
0.23
-0.23
1.62
-0.58
1.15
0.69
-0.12
-0.58
-0.46
*
1.04
0.69
•
-0.12
0.35
1.15
-0.23
-5.64 x
•
0.58
2.66
0.46
1.15
0.12
0.58
2.77
1.15
It s Above control limit
II s Below control limit
-------
26/29
EMSL-LV Inter-comparison Study: Air Filter, 28-Aug-1992
Cesium 137
Exper. Rng anal
Lab
LR
LT
LZ
M
MA
ME
ML
JWN
MP
MQ
MS
MV
N
NO
NH
NJ
NK
NO
NP
N5P
NV
NZ
0
OA
OB
OK
OL
OM
CMSfc
O5E
p
PB
PC,
PJ*
PE
PM
PP
PS
PU
PV
PW
Q
QA
QB
QC
• =
0 s
Res. 1
23.0
16.0
21.0
20.0
18.0
22.0
22.0
21.0
19.0
22.0
21.0
19.0
22.0
18.0
18.0
-
10.0
19.0
18.0
16.0
.....
,t
•• •
31.0
20.0
50.0
27.0
21.0
24.0
28.0
20.0
15.0
17.0
23.0
Res. 2
20.0
16.0
22.0
16.0
18.0
26.0
23.0
22.0
18.0
22.0
19.0
19.0
22.0
16.0
18.0
21.0
19.0
19.0
15.0
-
'
*
*
28.0
20.0
,.'&M*"
•*
28.0
22.0
24.0
25.0
20.0
17.0
17.0
22.0
Res. 3
20.0
16.0
22.0
15.0
19.0
26.0
17.0
24.0
17.0
22.0
20.0
22.0
21.0
16.0
19.0
17.0
18.0
21.0
15.0
, *.• ,
, ,„ ,
;- -
;* ,'
'
29.0
20.0
50.0
26.0
21.0
28.0
26.0
21.0
19.0
17.0
20.0
No data submitted
Insufficient
data
X 5
Sigma (R
1.73
0.00
0.58
2.65
0.58
2.31
3.21
1.53
1.00
0.00
1.00
1.73
0.58
1.15
0.58
,
5.57
0.58
1.53
0.58
, -
''
*
/<•••
1.53
0.00
! 0.5S
1.00
0.58
2.31
1.53
0.58
2.00
0.00
1.53
+ SR)
0.354
0.000
0.118
0.591
0.118
0.473
0.709
0.354
0.236
0.000
0^236
0.354
0.118
0.236
0.118
1.570
0.118
0.354
0.118
••
0.354
0.000
0.118
0.236
0.118
0.473
0.354
0.118
0.473
0.000
0.354
Average
21.00
16.00
21.67
17.00
18.33
24.67
20.67
22.33
18.00
22.00
20.00
20.00
21.67
16.67
18.33
16.00
18.67
19.33
15.33
-
'
29.33
20.00
50.33
27.00
21.33
25.33
26.33
20.33
17.00
17.00
21.67
TAG SYMBOLS
Determined to be an outlier
Normalized deviation
(grand-avg) (known) Tag
0.46
-1.27
0.69
-0.93
-0.47
1.73
0.34
0.92
-0.58
0.80
0.11
0.11
0.69
-1.04
-0.47
-1.27
-0.35
-0.12
-1.50
3.34
0.11
10,62
2.54
0.57
1.96
2.31
0.23
-0.93
-0.93
0.69
ft s Above
JJ. s Below
1.04
-0.69
«
1.27
-0.35
0.12
2.31
«
0.92
1.50
0.00
1.39
0.69
*
0.69
1.27
-0.46
«
0.12
»
«
-0.69
0.23
0.46
-0.92
*
*
*
-*
*
3.93 tt
0.69
11J20 X
•
*
3.12 It
1.15
•
2.54
2.89
0.81
-0.35
-0.35
1.27
« :
control limit
control limit
-------
EM8L-LV Intel-comparison Study: Air Filter, 28-Aug-1992
Cesium 137
Lab Res. 1
QD
QI
QJ
QK
QM
QQ
QU
QW
QX
QZ
R
RA
RC
RG
RH
1WT
RK
RN
RO
RQ
RS
KU
EW
S
SA
SC
SD
• iiSCJI
: SUK
SI
SM
SP
SR
88
ST/
sw
SY
sz
T
TA
TB
TB
TG
TB
Tf
• =
0 a
•*
19.0
20.0
•*
19.0
21.0
21.0
20.0
21.0
19.0
16.0
20.0
22.0
19.0
16.0
19.0
19.0
22.0
20.0
19.0
22.0
18.0
20.0
15.0
18.0
97.0
22.0
Res. 2
-
19.0
'
21.0
21.0
21.0
22.0
20.0
21.0
19.0
'
'
17.0
19.0
23.0
18.0
16.0
'
•"
-.
19.0
19.0
18.0
21.0
ft* f s fftf '
20.0
19.0
''
19.0
18.0
23.0
18.0
94,0
17.0
Res. 3
•*
19.0
20.0
f
22.0
21.0
22.0
20.0
21.0
19.0
14.0
19.0
21.0
18.0
16.0
19.0
-
18.0
13.0
27.0
V",' ,
21.0
19.0
20.0
19.0
22.0
20.0
810
20.0
No data submitted
Insufficient
data
X S
Exper.
Sigma
0.00
" '
0.58
1.53
0.00
0.58
0.00
0.00
o.oo
•
1.53
0.58
1.00
0.58
0.00
0.00
0.58
4.51
3.79
1.00
1.73
1.00
1.00
4.36
1.15
2.52
2.52
27/29
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known) Tag
0.000
0.118
0.354
0.000
0.118
0.000
0.000
0.000
0.354
0.118
0.236
0.118
0.000
0.000
0.118
1.120
0.827
0.236
0.354
0.236
0.236
0.945
0.236
0.591
0.591
19.00
20.33
20.67
21.00
21.67
20.00
21.00
19.00
15.67
19.33
22.00
18.33
16.00
19.00
18.67
17.67
22.67
20.00
20.00
19.00
19.00
20.00
18.67
94.3S
19.67
TAG SYMBOLS
Determined
to be an
outlier
,
-'
-0.23
0.23
0.34
0.46
0.69
0.11
0.46
-0.23
-1.39
-0.12
0.80
-0.47
-1.27
-0.23
-0.35
-0.70
1.04
0.11
0.11
-0.23
-0.23
0.11
-0.35
25.86
0.00
IT =s Above
U s Below
.
•»
0.35
*
0.81
*
0.92
1.04
1.27
0.69
1.04
0.35
*
•
-0.81
• -
0.46
1.39
0.12
-0.69
*;'
*
•
0.35
" •
0.23
-0.12
1.62
*
*
0.69
0.69
*
0.35
••
•
0.35
0.69
0.23
26.44 X
0.58
•
*
control limit
control limit
-------
28/29
Cesium 137
Lab Res. 1
IK
TL 14.0
IP 21.0
TS 20.0
TV 15.0
TW
X 23.0
Y 18.0
Z 19.0
EMSL-LV Intercomparison
Res. 2
14.0
20.0
19.0
13.0
24.0
18.0
19.0
Exper.
Res. 3 Sigma
,
14.0 6.00
20.0 0.58
19.0 0.58
14.0 1.00
23.0 0.58
19.0 0.58
17.0 1.15
Study: Air Filter, 28-Aug*1992
Rng anal Normalized deviation
(R + SR) Average (grand-avg) (known)
..
0.000 14.00 -1.97 -1.39
0.118 20.33 0.23 0.81
0.118 19.33 -0.12 0.46
0.236 14.00 -1.97 -1.39
..
0.118 23.33 1.27 1.85
0.118 18.33 -0.47 0.12
0.236 18.33 -0.47 0.12
Tag
*
#
Data sorted by Laboratory Average
Average
2.00
14.00
14.00
15.33
15.33
15.67
16.00
16.00
16.00
16.00
16.33
16.33
16.33
16.67
16.67
16.67
17.00
17.00
17.00
17.00
17.33
17.33
17.33
17.33
17.67
17.67
17.67
17.67
17.67
17.67
17.67
18.00
18.00
Tag
X
• = No data submitted
0 = Insufficient data
Lab
K
TV
TL
OB
CE
RH
RQ
NZ
LT
CA
HI
FZ
BI
NK
HL
CJ
QA
Q
MA
AI
JY
FK
CS
BL
SD
J
TTTC
EL
DE
BH
BC
MS
DT
Average
18.00
18.00
18.33
18.33
18.33
18.33
18.33
18.33
18.33
18.33
18.33
18.67
18.67
18.67
18.67
19.00
19.00
19.00
19.00
19.00
19.00
19.00
19.00
19.00
19.33
19.33
19.33
19.33
19.33
19.33
19.67
19.67
19.67
Tag Lab
DM
AA
Z
Y
RO
NP
ME
L
EB
DH
BO
TB
SC
O
FJ
T
SW
S
RA
QJ
JE
EA
E
AZ
TS
RK
OA
KM
EH
A
TG
LA
KH
Average Tag
19.67
19.67
19.67
19.67
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.00
20.33
20.33
20.33
20.67
20.67
20.67
21.00
21.00
21.00
21.00
21.00
21.00
21.33
21.33
21.33
21.33
TAG SYMBOLS ft = Above control
x = Determined to be an outlier & s Below control
Lab
BA
AP
AL
AH
TA
SS
SR
QZ
PB
NH
N
IU
GI
DD
D
CP
AU
TP
QM
PW
QU
MP
BM
R
QW
LR
1C
CO
BG
PP
LF
KX
JS
limit
limit
-------
EM8L-LV Intercomparison Study: Air Filter,
Cesium 137
28-Aug-1992
29/29
Data sorted by Laboratory Average
Average Tag Lab Average Tag Lab
21.33 GE 22.00 DO
21.33 FE 22.00 DG
21.33 DL 22.33 MQ
21.33 AE 22.33 EX
21.67 QX 22.33 AK
21.67 QB 22.67 SI
21.67 NJ 22.67 FL
21.67 M 23.00 AF
22.00 RN 23.33 X
22.00 MV 23.33 CQ
24.00 AN
Average Tag
24.67
25.33
25.67
26.00
26.33
27.00 ft
29.33 ft
50.33 x
94.33 x
6778.00 x
21401.33 x
Lab
ML
PU
KL
LE
PV
PM
P
PC
TE
DJ
EZ
% Frequency distribution of responding labs( expected prec. vs known value)
I
10 1 ill •!
. T_|I|||||B||||M
_•• _ —
-6 ' -4 exp. prec. '2 ' ^^ +2 exp. 'prec. *•
value
% Frequency distribution of responding labs(std. dev.
in ............ _• •_____.__
u lit til
T . if.llmll.f. _T
vs mean value)
-« ' -4 std. 'dev. -2 ' m^ +2 std. dev. **
value
• s No data submitted TAG SYMBOLS
0 s Insufficient data x 3 Determined to be an outlier
ft s Above
Jl = Below
i
i ^^^^
1
-t-6
control limit
control limit
------- |