The paired-difference t-test for the main difference between two populations assumes:
A) that the populations are approximately normally distributed
B) that the sample variances are equal
C) that the sample means are equal
D) all of these
E) none of these

Question

Quizplus · Accepted Answer

The paired-difference t-test assumes that the differences between paired observations are approximately normally distributed. It does not require the population variances to be equal or the sample means to be equal, as it deals with differences within pairs rather than direct comparisons between separate groups.

The Paired-Difference T-Test for the Main Difference Between Two Populations