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Sample sizes required per group for 80 power with a two-tailed test of the difference in two independent proportions
The proportions for the two groups are represented by the row and column proportions.
|
0.1 |
0.2 |
0.3 |
0.4 |
0.5 |
0.6 |
0.7 |
0.8 |
0.9 |
|||||||||
0.1 |
|
201 |
64 |
33 |
21 |
15 |
11 |
9 |
7 |
|||||||||
0.2 |
|
|
295 |
83 |
40 |
24 |
16 |
12 |
9 |
|||||||||
0.3 |
|
|
|
358 |
95 |
44 |
25 |
16 |
11 |
|||||||||
0.4 |
|
|
|
|
389 |
99 |
44 |
24 |
15 |
|||||||||
0.5 |
|
|
|
|
|
389 |
95 |
40 |
21 |
|||||||||
0.6 |
|
|
|
|
|
|
358 |
83 |
33 |
|||||||||
0.7 |
|
|
|
|
|
|
|
295 |
64 |
|||||||||
0.8 |
|
|
|
|
|
|
|
|
201 |
|||||||||