If the t distribution is to produce an accurate probability figure for an independent-samples t test, which of the following must be true?
A) the population means must be equal
B) the populations the samples are from must have equal variances
C) both of the descriptive alternatives are correct
D) neither of the descriptive alternatives is correct.

Question

Quizplus · Accepted Answer

For an independent-samples t test, the assumption of equal variances (homogeneity of variance) is necessary for the t distribution to produce an accurate probability figure.

If the T Distribution Is to Produce an Accurate Probability