Mathematics, 04.05.2021 21:30 cluchmasters5634
In a study of housing demand, a county assessor is interested in developing a regression model to estimate the selling price of residential properties within her jurisdiction. She randomly selects several houses and records the selling price in addition to the following values: the size of the house (in square feet), the total number of rooms in the house, the age of the house, and an indication of whether the house has an attached garage. These data are stored in the file HousingDemand.
A. Estimate and interpret a multiple regression equation that includes the four potential explanatory variables. How do you interpret the coefficient of the Attached Garage variable?
B. Evaluate the estimated regression equation’s goodness of fit.
C. Use the estimated equation to predict the sales price of a 3000-square-foot, 20-year-old home that has seven rooms but no attached garage. How accurate is your prediction?
House Selling Price Size # Rooms Age Attached Garage
1 $240,800 3070 7 23 1
2 $215,200 2660 6 23 1
3 $199,200 2390 7 20 1
4 $182,400 2240 6 9 0
5 $144,800 1500 7 17 0
6 $126,400 1440 7 8 0
7 $312,000 3720 9 31 1
8 $185,600 2520 7 15 1
9 $176,800 2160 7 8 0
10 $162,400 2140 8 20 1
11 $304,000 3000 8 15 1
12 $256,000 3000 8 18 1
13 $222,400 2700 7 17 1
14 $159,200 2020 7 18 0
15 $130,400 1200 6 17 0
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