2. A real estate builder wishes to determine how house size (House) is influenced by family income (Income X1), family size (Size X2), and education of the head of household (School X3). House size is measured in hundreds of square feet, income is measured in thousands of dollars, and education is in years. The builder randomly selected 50 families and ran the multiple regression. The estimated coefficients are Coefficients: Estimate (Intercept) -1.6335 X1 0.4485 X2 4.2615 X3 -0.6517 Std. Error 5.8078 0.1137 0.8062 0.4319