Prediction of group size for appropriate mean values (SD), a significance level α = 0.05 and a statistical power of 0.80 and 0.90, respectively (refers to example 1)
| 75% (20%) versus 80% (20%) | 75% (20%) versus 85% (20%) | 75% (30%) versus 80% (30%) | 75% (30%) versus 85% (30%) | |
|---|---|---|---|---|
| Power 80% | 253 | 64 | 567 | 143 |
| Power 90% | 338 | 86 | 758 | 191 |