13.7. For the "house selling price" data file at the text Web site, Table 13.14 shows results of modeling y = selling price (in dollars) in terms of size of home (in square feet) and whether the home is new (1 = yes; 0 = no).

(a) Report and interpret the prediction equation, and form separate equations relating selling price to size for new and for not new homes.

(b) Find the predicted selling price for a home of 3000 square feet that is (i) new, (ii) not new.

TABLE 13.14 Parameter B Std. Error t Sig Intercept -40230,,867 14696..140 -2,.738 .007 size 116,,132 8 .795 13..204 .000 new 57736.,283 18653..041 3..095 .003