Refer to Exercise 7.15. a. If the sampled populations are normal, what is the sampl...

Refer to Exercise 7.15.

a. If the sampled populations are normal, what is the sampling distribution of ̅x for parts a, b, and c?

b. According to the Central Limit Theorem, if the sampled populations are not normal, what can be said about the sampling distribution of ̅x for parts a, b, and c?

Reference:

Random samples of size n were selected from populations with the means and variances given here. Find the mean and standard deviation of the sampling distribution of the sample mean in each case: