In testing for the significance of the difference between two sample means when the sample size is small,we may assume equal population variances if
A)sample sizes are exactly the same.
B)sample sizes are varied.
C)sample sizes are approximately equal.
D)none of these,we cannot assume equal population variance.

Question

Quizplus · Accepted Answer

When the sample sizes are approximately equal, it is reasonable to assume equal population variances for small sample sizes. If the sample sizes are too different, it may not be appropriate to assume equal population variances. If the sample sizes are exactly the same, we can assume equal population variances, but this is a rare occurrence. Therefore, choice C is the best answer.

In Testing for the Significance of the Difference Between Two