Table 1.
Estimated Type I error rates at significant level 0.05 based on the four methods under different parameter settings of the three-component mixture distributions with τ1 = 0.1, τ2 = 0.9 and δμ = 0.05
| Parameter Setting | π1 | π2 | π3 | μ | σ | t-test | Linear regression | Wilcox | BWS |
|---|---|---|---|---|---|---|---|---|---|
| 1 |
0.3 |
0.5 |
0.2 |
0.3 |
0.1 |
0.0513 |
0.0521 |
0.0514 |
0.0458 |
| 2 |
0.4 |
0.5 |
0.1 |
0.2 |
0.1 |
0.0495 |
0.0494 |
0.0519 |
0.0492 |
| 3 |
0.4 |
0.5 |
0.1 |
0.3 |
0.2 |
0.0511 |
0.0519 |
0.0503 |
0.0495 |
| 4 |
0.5 |
0.1 |
0.4 |
0.3 |
0.2 |
0.0528 |
0.0521 |
0.0544 |
0.0511 |
| 5 | 0.4 | 0.2 | 0.4 | 0.2 | 0.1 | 0.0509 | 0.0510 | 0.0472 | 0.0464 |