13.18 In Problem 13.6 on page 440, a prospective MBA student wanted to predict starting salary upon graduation, based on program per-year tuition (stored in FTMBA). Using the results of that problem, a. determine the coefficient of determination, r 2, and interpret its meaning. b. determine the standard error of the estimate. c. How useful do you think this regression model is for predicting starting salary?

13.20 In Problem 13.6 on page 440, you used annual revenues to predict the current value of a MLB baseball team, using the data stored in MLB Values. Using the results of that problem, a. determine the coefficient of determination, r , and interpret its meaning. b. determine the standard error of the estimate. c. How useful do you think this regression model is for predicting the value of a MLB baseball team?

13.28 In Problem 13.6 on page 440, a prospective MBA student wanted to predict starting salary upon graduation, based on pro- gram per-year tuition. Perform a residual analysis for these data (stored in FTMBA). Based on these results, evaluate whether the assumptions of regression have been seriously violated.

*I previously posted these questions and was asked to show the previous question (13.6) which was already answered so please focus of these ones. Thank you!