FAQ/tab90232013-03-08 10:17:40localhostconverted to 1.6 markup22010-07-22 14:20:40PeterWatson12010-07-22 14:20:30PeterWatsonSample sizes required per group for 90 power with a two-tailed test of the difference in two independent proportionsThe 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
0.1 269 85 45 28 20 15 11 9
0.2 395 111 54 32 22 15 11
0.3 479 127 58 33 22 15
0.4 521 132 58 32 20
0.5 521 127 54 28
0.6 479 111 45
0.7 395 85
0.8 269