Under what conditions can the t-distribution be correctly employed to test the difference between two population means?
A) When the samples from the two populations are small and the population variances are unknown
B) When the two populations of interest are assumed to be normally distributed
C) When the population variances are assumed to be equal
D) All of the above

Question

Quizplus · Accepted Answer

The t-distribution can be correctly employed to test the difference between two population means when the samples are small and the population variances are unknown, the populations are assumed to be normally distributed, and the population variances are assumed to be equal. All these conditions (A, B, and C) support the use of the t-distribution for hypothesis testing regarding means.

Under What Conditions Can the T-Distribution Be Correctly Employed to Test