Table 3 Sample Size and Power
Sample Size | 15% Attrition | N = 200 (100/group) | 20% Attrition | N = 190 (95/group) | 25% Attrition | N = 180 (90/group) | ||||||
|---|---|---|---|---|---|---|---|---|---|
Power | 81% | 86% | 91% | 78% | 84% | 90% | 75% | 82% | 88% |
Effect Size | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
Sample Size | 15% Attrition | N = 200 (100/group) | 20% Attrition | N = 190 (95/group) | 25% Attrition | N = 180 (90/group) | ||||||
|---|---|---|---|---|---|---|---|---|---|
Power | 81% | 86% | 91% | 78% | 84% | 90% | 75% | 82% | 88% |
Effect Size | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |