A random sample of n = 4 scores is selected from a population with = 80 and = 20. On average, how much difference would you expect between the sample mean and the population mean? Explain your response. 0 points (the sample mean should be the same as the population mean) 5 points 10 points 80 points Solution Ans. 0 points. On average the sample mean should center around the population mean, thus the expected difference between the sample mean and population mean is 0 points..