When developing an interval estimate for the difference between two sample means, with sample sizes of n1 and n2,
A) n1 must be equal to n2
B) n1 must be smaller than n2
C) n1 must be larger than n2
D) n1 and n2 can be of different sizes,

Question

Quizplus · Accepted Answer

There is no requirement that the sample sizes must be equal for developing an interval estimate for the difference between two sample means. The formula for the interval estimate takes into account the sample sizes of both samples, so they can be different. Therefore, option D is the best choice.

When Developing an Interval Estimate for the Difference Between Two