The expected performances of six methods under the evaluation model 2 on the simulated data with unequal variances, where σ
= 0.5, σ
= 1 and n
≡ 60. The expected Precision Rates and Recall Rates of six methods as well as their error limits on the simulated data with unequal variances (σ1 = 0.5,σ2 = 1) in the evaluation model 2, where the number of overall samples is fixed at 60.