Table 7.

Simulation 2, under the null hypothesis, the performance of AIPWCC stratified test statistics and weighted test statistics with stratified sampling. In each cell, the left column corresponds to AIPWCC stratified test statistics and the right column corresponds to weighted test statistics. Sample size N=2000, n₁₁ = n₁₂ = n₀₁ = n₀₂ = 300. Correct model specification.

truncation	Pr(stat ≥ 1.96)	Pr(stat ≤ 1.96)	Pr(|stat| ≥ 1.96)
no	0.028—0.026	0.024—0.028	0.052—0.054
at 3.50	0.028—0.026	0.026—0.032	0.054—0.058
at 3.25	0.022—0.026	0.030—0.032	0.052—0.058
at 3.00	0.024—0.022	0.030—0.032	0.054—0.054
at 2.75	0.026—0.020	0.028—0.032	0.054—0.052
at 2.50	0.026—0.022	0.026—0.032	0.052—0.054