The expected value of the difference of two sample means equals the difference of the corresponding population means:
A) only if the populations are normally distributed.
B) only if the samples are independent.
C) only if the populations are approximately normal and the sample sizes are large.
D) All of these choices are correct.

Question

Quizplus · Accepted Answer

The Answer of The expected value of the difference of two sample means equals the difference of the corresponding population means:
A) only if the populations are normally distributed.
B) only if the samples are independent.
C) only if the populations are approximately normal and the sample sizes are large.
D) All of these choices are correct.

The Expected Value of the Difference of Two Sample Means