If a population has a variance of 6.4, what is the variance of the sampling distribution of the means if the sample size is 4 and all the possible samples are drawn with replacements? If the...

If a population has a variance of 6.4, what is the variance of the sampling distribution
of the means if the sample size is 4 and all the possible samples are drawn with
replacements?

If the population has a standard deviation of 9.4, what is the standard deviation of the
sampling distribution of its means? The sampling distribution was derived with sample
size n=3, and all the possible samples were drawn with replacements.

If the population standard deviation is 5.6, what is the population variance?