Table 15: Bias results for NIST 1849a CRM practice sample
Sample ID: Sample 1 L-2794/F-3353
Analyte
CMP
UMP
GMP
IMP
AMP
Seq.
Item
Symbol
Value
Value
Value
Value
Value
1
Mean
28.1
11.8
15.1
0.0
10.9
2
Certified value
µ
26.8
12.9
14.6
n/a
10.5
3
Uncertainty
U
CRV
2.90
1.50
1.10
n/a
0.53
4
Coverage factor
k
2.57
2.57
2.57
n/a
2.57
5
Nominal bias
S
R
+5.0%
-8.9%
+3.2%
n/a
+3.5%
6
Students test-statistic
t
Stat
1.16
1.92
1.05
n/a
1.63
7
Degrees of freedom
DF
5.6
5.4
6.1
n/a
7.3
8
p-value
0.30
0.11
0.34
n/a
0.15
