Question: Assume we're using a pooled-variance two-sample hypothesis test to test the difference in means. H_0: _1 = _2 vs H_A: _1 _2. Which of

Assume we're using a pooled-variance two-sample hypothesis test to test the difference in means.

H_0: _1 = _2 vs H_A: _1 "" _2. Which of the following assumptions are required? (There can be more than one)

A. The data distribution is normal. B. The sampling distributions of the sample means are both normal.

C. The sampling distribution of the difference of means is normal.

D. The variances of the populations are equal. E. The variances of the populations are normal.

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