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 the above;we cannot assume equal population variance

Question

Quizplus · Accepted Answer

When sample sizes are small and approximately equal, we can assume equal population variances for testing the significance of the difference between two sample means. However, if the sample sizes are very different, it is better to use unequal variances or conduct a non-parametric test. If the sample sizes are the same, we can assume equal variances regardless of the sample size.

In Testing for the Significance of the Difference Between Two