Formulas and Tables
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Sigma
Sigma of the individuals (actual sigma)
Estimated sigma
|
Subgroup Size
|
d2
|
Subgroup Size
|
d2
|
|
2
|
1.128
|
14
|
3.407
|
|
3
|
1.693
|
15
|
3.472
|
|
4
|
2.059
|
16
|
3.532
|
|
5
|
2.326
|
17
|
3.588
|
|
6
|
2.534
|
18
|
3.640
|
|
7
|
2.704
|
19
|
3.689
|
|
8
|
2.847
|
20
|
3.735
|
|
9
|
2.970
|
21
|
3.778
|
|
10
|
3.078
|
22
|
3.819
|
|
11
|
3.173
|
23
|
3.858
|
|
12
|
3.258
|
24
|
3.895
|
|
13
|
3.336
|
25
|
3.931
|