2158-2159 / 2239
Step 1:
Determine the
mean value
from a series of observations:
Type A evaluation:
Step 2:
Determine the
positive root of the estimate of the variance
of the mean value
∑
=
=
N
k
ki
i
x
N
x
1
,
1
78
∑
=
−
− ⋅
=
+=
N
k
ki
i
x x
NN
xs
u
1
2
,
2
)
(
)1 (
1
) (