Table 1 Statistical power of each method of analysis
Correlation | ρ = 0.2 | ρ = 0.35 | ρ = 0.5 | ρ = 0.65 | ρ = 0.8 |
|---|---|---|---|---|---|
POST | 70.5% | 70.5% | 70.5% | 70.5% | 70.5% |
FRACTION | 45.1% | 56.4% | 67.0% | 82.7% | 97.1% |
CHANGE | 50.7% | 59.2% | 70.5% | 84.8% | 97.7% |
ANCOVA | 72.3% | 76.1% | 82.3% | 90.8% | 98.6% |