In Problem 13.8 on page 470, you used land area of a property and age of a house to predict the fair market value (stored in GlenCove). Using the results from that problem,
a. construct a 95% confidence interval estimate of the population slope between fair market value and land area of a property.
b. at the 0.05 level of significance, determine whether each independent variable makes a significant contribution to the regression model. On the basis of these results, indicate the independent variables to include in this model.

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