Significance level (α)
Power (1-β)
Two-sided
One-sided
0.5
0.8
0.9
0.95
0.99
0.20
(0.10)
1.7
4.6
6.6
8.6
14
0.10
(0.05)
2.8
6.6
8.6
11
16
0.05
(0.025)
3.9
7.9
11
13
19
0.01
(0.005)
6.7
12
15
18
25
0.001
(0.0005)
11
18
21
25
32
Table 1:
Base sample size, (Z
α/2
+ Z
β
)
2
, as a function of significance level (α) and power (1 − β).
