Population size | 95%Confidence interval Margin of error | |||
5.0% | 3.5% | 2.5% | 1.0% | |
10 | 10 | 10 | 10 | 10 |
20 | 19 | 20 | 20 | 20 |
30 | 28 | 29 | 29 | 30 |
50 | 44 | 47 | 48 | 50 |
75 | 63 | 69 | 72 | 74 |
100 | 80 | 89 | 94 | 99 |
150 | 108 | 126 | 137 | 148 |
200 | 132 | 160 | 177 | 196 |
250 | 152 | 190 | 215 | 244 |
300 | 169 | 217 | 251 | 291 |