Multiple Choice
Two independent samples of sizes 40 and 50 are randomly selected from two populations to test the difference between the population means . Assume the population variances are known. The sampling distribution of the sample mean difference
is:
A) normally distributed.
B) approximately normal.
C) Student t- distributed with 88 degrees of freedom.
D) None of these choices.
Correct Answer:

Verified
Correct Answer:
Verified
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