Assume that the following represent a population of N  16 values.

25 12 21 13 19 17 15 18 23 16 18 15 22 14 23 17

a. Compute the population mean.

b. If a random sample of n  9 includes the following values 12 18 13 17 23 14 16 25 15 compute the sample mean and calculate the sampling error for this sample.

c. Determine the range of extreme sampling error for a sample of size n  4. (Hint: Calculate the lowest possible sample mean and highest possible sample mean.)