Access the data AnnArbor_Rental from the text website. The data represent the rent, the number of bedrooms, the number of bathrooms, and the square footage for 40 apartments in the college town of Ann Arbor, Michigan.

a. Determine the sample regression equation that enables us to predict the rent on the basis of the number of bedrooms, the number of bathrooms, and the square footage.

b. Interpret the coefficient of determination. What percent of the variation in Rent is unexplained by the sample regression equation?

c. At the 5% significance level, are the explanatory variables jointly significant?

d. At the 5% significance level, are the explanatory variables individually significant?