If two random samples of sizes 30 and 35 are selected independently from two populations whose means are 85 and 90, then the mean of the sampling distribution of the sample mean difference, , equals 5.

Question

If two random samples of sizes 30 and 35 are selected independently from two populations whose means are 85 and 90, then the mean of the sampling distribution of the sample mean difference,  , equals 5.

Quizplus · Accepted Answer

The mean of the sampling distribution of the sample mean difference is equal to the difference between the population means, which is 90 - 85 = 5. Therefore, the statement in the question is true and the answer is A.

If Two Random Samples of Sizes 30 and 35 Are