Combining data from two samples to make a pooled variance estimate is logically justified when
A) the two n's are equal
B) the two n's are unequal
C) it can be assumed that the two population standard deviations are equal
D) it can be assumed that the two population standard deviations are unequal

Question

Quizplus · Accepted Answer

A pooled variance estimate is justified when it can be assumed that the two population standard deviations are equal, as it combines the variances of the two samples under this assumption.

Combining Data from Two Samples to Make a Pooled Variance