Table 3: Simulated power (%) for three Wald Tests with different variance ratios when the numbers of product lots are equal if f = 1.5 and μ T μ R = σ R 8 .

nT nR σ T 2 σ R 2 Simulated Power
CMLE MWCMLE UMWCMLE
6 6 0.25 68.851 75.1763 78.2522
0.5 56.9287 64.8567 68.816
1.0 38.9725 47.837 52.681
2.0 19.7563 27.1498 31.4647
4.0 6.9084 10.799 13.4001
10 10 0.25 91.8434 91.8434 94.3174
0.5 86.0486 88.771 89.9659
1.0 73.0699 77.5285 79.557
2.0 49.5325 49.5325 58.6029
4.0 21.9434 27.0984 29.9405
15 15 0.25 98.5048 98.8007 98.9615
0.5 96.7669 97.3917 97.6942
1.0 91.4305 92.8779 93.5281
2.0 76.5988 79.6186 81.0726
4.0 47.3085 51.6418 53.8816
25 25 0.25 99.9478 99.9584 99.9661
0.5 99.8275 99.8673 99.8751
1.0 99.176 99.3103 99.3827
2.0 95.5465 96.1386 96.4221
4.0 80.8819 82.6019 83.4914
100 100 0.25 100 100 100
0.5 100 100 100
1.0 100 100 100
2.0 100 100 100
4.0 99.9954 99.9965 99.9964
1000 1000 0.25 100 100 100
0.5 100 100 100
1.0 100 100 100
2.0 100 100 100
4.0 100 100 100