Reconsider Exercise 7.2.16 about rebounding free throws. 

a. Use the 2SD method to create an approximate 95% confidence interval for the mean difference in number of shots made (rebounded – self-rebounded) for the population of interest. 

b. Based on your confidence interval from part (a), is there strong evidence that the mean number of shots made differs between self-rebounding and when someone else rebounds? Explain.

Data from Exercise 7.2.16