A normal population has a mean of Āµ = 80 with Ļ = 20.
a. If a single score is randomly selected from this population, how much distance, on average, will be found between the score and the population mean?
b. If a sample of n = 25 scores is randomly selected from this population, how much distance, on average, will be found between the sample mean and the population mean?
c. If a sample of n = 100 scores is randomly selected from this population, how much distance, on average, will be found between the sample mean and the population mean?