HOMEWORK
Chapter 3 (Hill: 3.3, 3.10, 3.4, 4.13(f,g))
Statistical Inference in Simple Regression Analysis
1. In an estimated simple regression model, based on 24 observations, the estimated slope parameter is 0.310 and the estimated standard error is 0.082.
(a) Test the hypothesis that the slope is zero, against the alternative that it is not, at 1% level of significant.
(b) Test the hypothesis that the slope is zero, against the alternative that it is positive, at 1% level of significant.
(c) Test the hypothesis that the slope is zero, against the alternative that it is negative, at 5% level of significant.
(d) Test the hypothesis that the slope is 0.5, against the alternative that it is not, at 5% level of significant.
(e) Obtain a 99% confidence interval estimate of the slope.
2. The file hw_ch2_3.xls contains data on 1080 houses sold in Baton Rouge, Louisiana during mid-2005.
(a) Estimate the regression model PRICE = β1+ β2SQFT + ε and construct a 95% confidence interval estimate for β2.
(b) Test the hypothesis that an additional square foot of living area increases house price by $80 in part (a). Use a two-tail test using the α = 0.05 level of significance.
(c) Test the hypothesis H0: β2 80 H1: β2< 80 using α = 0.05.
(d) Test the hypothesis H0: β1= 0 H1: β1 ≠ 0 using α = 0.05.
(e) Test the hypothesis H0: β2= 0 H1: β2 ≠ 0 using α = 0.05.
(f) Test the hypothesis H0: β2 0 H1: β2>0 using α = 0.05.
HOMEWORK
Chapter 3 (Hill: 3.3, 3.10, 3.4, 4.13(f,g))
Statistical Inference in Simple Regression Analysis
1. In an estimated simple regression model, based on 24 observations, the estimated slope parameter is 0.310 and the estimated standard error is 0.082.
(a) Test the hypothesis that the slope is zero, against the alternative that it is not, at 1% level of significant.
(b) Test the hypothesis that the slope is zero, against the alternative that it is positive, at 1% level of significant.
(c) Test the hypothesis that the slope is zero, against the alternative that it is negative, at 5% level of significant.
(d) Test the hypothesis that the slope is 0.5, against the alternative that it is not, at 5% level of significant.
(e) Obtain a 99% confidence interval estimate of the slope.
2. The file hw_ch2_3.xls contains data on 1080 houses sold in Baton Rouge, Louisiana during mid-2005.
(a) Estimate the regression model PRICE = β1+ β2SQFT + ε and construct a 95% confidence interval estimate for β2.
(b) Test the hypothesis that an additional square foot of living area increases house price by $80 in part (a). Use a two-tail test using the α = 0.05 level of significance.
(c) Test the hypothesis H0: β2 80 H1: β2< 80 using α = 0.05.
(d) Test the hypothesis H0: β1= 0 H1: β1 ≠ 0 using α = 0.05.
(e) Test the hypothesis H0: β2= 0 H1: β2 ≠ 0 using α = 0.05.
(f) Test the hypothesis H0: β2 0 H1: β2>0 using α = 0.05.
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