TABLE II

Sample sizes to detect a difference in two proportions, pA and pB, at a 5% significance level with 80% power

pB
pA0.050.100.150.200.250.300.350.400.450.500.550.600.650.700.750.800.850.900.951.00
0.0015274483527221815131110876654432
0.0543514176493627221815121198765443
0.10686199100624332252016141110876544
0.1590625012173493627221714121087654
0.2010942941388254392923181512108765
0.251251329152895841312419151210876
0.30137735616393614231241915121086
0.351471376170966243312418141197
0.40153438817397624231231714118
0.4515653921739661412922161210