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Assignment 13 solutions

# Assignment 13 solutions - Fall 2009 Hansen Assignment 13...

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Unformatted text preview: Fall 2009 Hansen Assignment 13 solutions Due 12/8/2009 9:10 AM Data for all questions have been entered below to make your life (and ours) easier. 1. Problem 9.1 in Ross. a) Scatterplot b) Linear curve fit g = 2.46 G = 1.21 5 10 15 20 6 8 10 12 14 16 18 20 22 24 26 5 10 15 20 5 10 15 20 25 30 x y Fall 2009 Hansen scatter(x,y) hold on, plot(x,y1), hold off xlabel('x'),ylabel('y') 2. Problem 9.4 in Ross. a. Scatterplot – linear relationship seems somewhat reasonable b. Regression coefficients g = −2825.9 G = 12245.75 ¡ = −2825.9 + 12246 ∗ ¢ c. x=0.43, y=2439.8 0.39 0.4 0.41 0.42 0.43 0.44 0.45 0.46 0.47 0.48 1600 1800 2000 2200 2400 2600 2800 3000 3200 Fall 2009 Hansen 3. Problem 9.9 in Ross. a. gG¡ ¢ £ = ¤ ¢ ¡¡ ¥ = 845,280.5 ¡ ¢ = ¦ ¦§¢ ¤ ¨ ¢ = © ¦§¢ u Gª « − ª ¨ « £ ¢ ¦ «¬© = ­­ ® ¦§¢ = 105,660 Remember ª ¨ « = ¯ + ° ∗ ± « b. 90% 2-sided confidence interval for ¤ ¢ ² ³.³´,µ ¢ = 15.507,² ³.¶´,µ ¢ = 2.733 · ¡¡ ¥...
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