The t test for the difference between the means of two independent populations assumes that the respective
A) populations are approximately normal.
B) sample sizes are equal.
C) sample variances are equal.
D) all of the above

Question

Quizplus · Accepted Answer

The t-test for the difference between the means of two independent populations assumes that the populations are approximately normal. Equal sample sizes are not required, and while equal variances are assumed in a standard t-test, there are variations like Welch's t-test that do not require this assumption.

The T Test for the Difference Between the Means of Two