Table 2 Sample size required to attain 95% and 75% power to detect a difference of 0.7
From: Biological monitoring of pesticide exposures in residents living near agricultural land
| Â | Sample size required | |
|---|---|---|
Standard deviation on log-scale | 95% Power | 75% Power |
0.6 | 12 | 8 |
0.7 | 16 | 10 |
0.8 | 20 | 12 |
0.9 | 24 | 14 |
1.0 | 29 | 17 |
1.1 | 35 | 20 |
1.2 | 41 | 23 |
1.3 | 47 | 26 |
1.4 | 54 | 30 |