Distribution | Post-treatment scores | |||||
---|---|---|---|---|---|---|
 | Standard deviation | Skewness | Kurtosis | |||
 | Empirical | Simulation | Empirical | Simulation | Empirical | Simulation |
Moderate positive skew | 17.01 | 17.02 | 1.62 | 1.63 | 5.71 | 6.00 |
Uniform | 13.49 | 13.49 | -0.11 | -0.11 | 2.08 | 2.01 |
Extreme asymmetry | 8.96 | 9.78 | 3.03 | 2.90 | 13.77 | 13.97 |
Extreme negative skew | 22.17 | 21.88 | -1.74 | -1.79 | 5.88 | 5.85 |
 | Change scores | |||||
 | Standard deviation | Skewness | Kurtosis | |||
 | Empirical | Simulation | Empirical | Simulation | Empirical | Simulation |
Moderate positive skew | 10.40 | 18.80 | 0.35 | 0.01 | 4.49 | 5.15 |
Uniform | 12.31 | 14.56 | 0.00 | 0.43 | 3.05 | 2.98 |
Extreme asymmetry | 10.62 | 10.97 | 0.88 | 1.08 | 5.38 | 6.37 |
Extreme negative skew | 15.51 | 15.02 | 0.00 | 0.75 | 6.31 | 8.52 |