Given the printout in Exercise 16.15, briefly summarize the overall results in the context of that exercise:

a. Identify and interpret each of the partial regression coefficients.

b. What proportion of the variation in y is explained by the equation?

c. At what p-value is the overall regression equation significant?

d. For each of the partial regression coefficients, at what p-value does the coefficient differ from zero? Which independent variables appear to be most and least useful in explaining changes in y?

( DATA SET ) Note: Exercises 16.39–16.45 require a computer and statistical software.