Use the results from Problem 3 in Chapter 8, as well as the computer output given here, to answer the following questions about the data from that problem.
a. Conduct overall regression F tests for these three models: Y regressed on weight and age; Y regressed on weight alone; and Y regressed on age alone. Based on your answers, how would you rate the importance of the two variables in predicting Y?
Comment on how your answer here compares with your answer to Problem 3(b) in Chapter 8.

b. Provide variables-added-in-order tests for both variables, with weight (X1) added first. Use α = .05.
c. Provide variables-added-in-order tests for both variables, with age (X2) added first. Use α = .05.
d. Provide a table of variables-added-last tests for both weight and age.
e. What, if any, differences are discernible in the results of the approaches in parts (a) through (d)?