The t test for the difference between the means of two independent populations assumes that the respective
A) sample sizes are equal.
B) populations are approximately normal.
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. While equal sample sizes and equal sample variances are preferred, they are not absolutely necessary. Therefore, the best choice is option B, which states that the assumption of normality is necessary for the t test for the difference between two means of independent populations.

The T Test for the Difference Between the Means of Two