Use the data of Problem 1 in Chapter 8 to answer the following questions.
a. Conduct the overall F tests for significant regression for the three models in Problem 1 of Chapter 8. Be sure to state the null and alternative hypotheses for each test and interpret each result.
b. Based on your results in part (a), which of the three models is best? Compare your answer here with your answer to Problem 1(b) in Chapter 8.