Table 1.
Empirical type I error rate and power of each method obtained from 1000 replicates with nominal significance level of 0.05.
| Sample size | Test | Type I error rate | Power
|
|||
|---|---|---|---|---|---|---|
| (a) | (b) | (c) | (d) | |||
| n1 = n2 = n3 = 50 | U | 0.048 | 0.281 | 0.289 | 0.132 | 0.044 |
| V | 0.043 | 0.036 | 0.079 | 0.845 | 0.721 | |
| UV | 0.047 | 0.187 | 0.244 | 0.832 | 0.628 | |
| LR | 0.048 | 0.273 | 0.310 | 0.185 | 0.066 | |
| GW | 0.052 | 0.235 | 0.268 | 0.449 | 0.215 | |
|
| ||||||
| n1 = n2 = n3 = 100 | U | 0.047 | 0.545 | 0.495 | 0.301 | 0.072 |
| V | 0.036 | 0.049 | 0.137 | 0.995 | 0.965 | |
| UV | 0.054 | 0.431 | 0.464 | 0.995 | 0.935 | |
| LR | 0.051 | 0.533 | 0.521 | 0.349 | 0.092 | |
| GW | 0.053 | 0.469 | 0.479 | 0.777 | 0.356 | |