Part Number
Issue
Date
Page
6159937790
12
03/2018
138 / 184
03/2018
138 (184)
9.2.6
Q544000
Q544000_1990:
The
dispersion
for the j-th group is calculated as follows:
j
j
Min
Max
W
j
Where:
Max
j
is the maximum value in the samples of the j-th group.
Min
j
is the minimum value in the samples of the j-th group.
The
average value
of the W
j
is calculated as follows:
K
W
W
j
The σ
i
is calculated as follows:
*
dn
W
i
Where:
dn* is calculated from the following table based on the number of samples:
N
dn*
C
10
0.500
1.64
12
0.555
1.55
14
0.598
1.48
16
0.632
1.43
18
1.097
1.40
20
1.412
1.37
24
1.468
1.32
28
1.521
1.30
30
1.746
1.28
35
1.789
1.26
40
1.824
1.24
50
1.877
1.21
And
σ
i
refers to the whole set of samples.