The file 2015 Cardinals shows the player positions and annual salaries for the Arizona Cardinals NFL players

Question:

The file 2015 Cardinals shows the player positions and annual salaries for the Arizona Cardinals NFL players (source: www.spotrac.com/nfl).

a. Calculate the average total salary for the Arizona Cardinals.

b. Calculate the smallest sample mean for total salary and the largest sample mean for total salary using a sample size of 10. Calculate the sampling error for each sample mean.

c. Repeat the calculations in part b for a sample size of 5.

d. What effect does a change in the sample size appear to have on the dispersion of the sampling errors?

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