N4

Suppose that we will take a random sample of size a from a population having mean u and standard deviation o For each of the following situations, find the mean, variance, and standard deviation of the sampling distribution of the sample mean i (a) = 18, 0 2, n - 22 (Round your answers of "o , " and "o , Is to 4 decimal places.) (b) = 494, 0= 3. n= 125 (Round your answers of "o , " and "a "" to 4 decimal places) ay 2