Table 2
Sample size required for different proportions and design effects
Proportion
Design effect
1.0
1.5
2.0
2.5
3.0
0.26–0.50
30
45
60
75
90
0.25
32
48
64
80
96
0.20
40
60
80
100
120
0.15
53
80
107
133
160
0.10
80
120
160
200
240
0.05
160
240
320
400
480