The file  contains Credit Scores the average credit scores of people from 2,750 American cities.
a. Select five different samples of n = 2, n = 5, n = 15, and n = 30.
b. Compute the sample mean of each sample. Develop a frequency distribution of the sample means for the results of the entire class, based on samples of sizes n = 2, n = 5, n = 15, and n = 30.
c. What can be said about the shape of the sampling distribution for each of these sample sizes?