Table 1 Power and empirical type I error rate for given α = 0.05
Sample size | Power | Type I error | ||
|---|---|---|---|---|
|  | β3 = -0.65 | β3 = -0.95 | β3 = -1.20 | β3 = 0 |
150 | 0.348 | 0.642 | 0.780 | 0.052 |
200 | 0.540 | 0.668 | 0.894 | 0.048 |
250 | 0.604 | 0.852 | 0.898 | 0.054 |
300 | 0.664 | 0.884 | 0.960 | 0.046 |
400 | 0.760 | 0.948 | 1.000 | 0.050 |
600 | 0.876 | 1.000 | 1.000 | 0.052 |