Refer to the previous exercise. Using software with the Florida data file at the text website,

(a) Construct box plots for each variable and scatterplots and partial regression plots between y and each of x1 and x2. Interpret these plots.

(b) Find the prediction equations for the (i) bivariate effects of x1 and of x2, (ii) multiple regression model. Interpret the estimated regression coefficients.

(c) Find R2 for the multiple regression model, and show that it is not much larger than r2 for the model using urbanization alone as the predictor. Interpret.