14.17. For the Houses data file, Table 14.13 shows results of fitting a quadratic regression model with
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14.17. For the Houses data file, Table 14.13 shows results of fitting a quadratic regression model with s = size as the predictor.
(a) Interpret the coefficients of this equation.What shape does it have?
(b) Find the predicted selling price for homes with (i) s =
1000 square feet, (ii) s = 2000 square feet, (iii) s = 3000 square feet. Explain why the effect of a 1000-square-foot increase in s increases as s increases.
TABLE 14.13 Variable Estimate Std. Error t Sig Intercept 5507.551 35626.650 .155 .877 size 65.156 36.289 1.795 .076 size*size .014 .008 1.740 .085
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Related Book For
Statistical Methods For The Social Sciences
ISBN: 9781292220314
5th Global Edition
Authors: Alan Agresti
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