The independent groups t test is quite robust to the assumption of homogeneity of variance when the _____ are _____.
A)variances;unequal
B)sample sizes;equal
C)sample sizes;fairly discrepant
D)means;independent

Question

Quizplus · Accepted Answer

The independent groups t test assumes that the variances of the two groups are equal, but it is quite robust to violations of this assumption when the sample sizes are equal. When the sample sizes are unequal, however, the test can become less powerful and less accurate. Therefore, the best choice is B: sample sizes are equal.

The Independent Groups T Test Is Quite Robust to the Assumption