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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

  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