Table 5–
Values of f(a,b) to be used in computing required number of patients
β
(type II error)
0.05
0.1
0.2
α (type I error)
0.1
10.8
8.6
6.2
0.05
13.0
10.5
7.9
0.02
15.8
13.0
10.0
0.01
17.8
14.9
11.7