HW7-Solutions - STAT 101 Agresti Homework 7 Solutions...

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Unformatted text preview: STAT 101 - Agresti Homework 7 Solutions 11/1/10 Chapter 9 9.1. (a) y = college GPA. (b) y = number of children. (c) y = annual income. (d) y = assessed value of home. 9.3. (a) The y-intercept is 61.4, and the slope is 2.4. For each additional centimeter in length of the femur, predicted height increases by 2.4 centimeters. (b) ˆ y = 61.4 + 2.4(50) = 181.4 cm. 9.7. (a) (i) ˆ y = 1.26 + 0.346(0.8) = 1.54; (ii) ˆ y = 1.26 + 0.346(34.3) = 13.1. (b) ˆ y y- = 19.7 – 13.1 = 6.6; the U.S. is producing 6.6 metric tons per capita more in CO 2 emissions than predicted by the regression line. (c) ˆ y = 1.26 + 0.346(28.1) = 11.0; ˆ y y- = 5.7 – 11.0 = –5.3; Switzerland is producing 5.3 metric tons per capita less in CO 2 emissions than predicted by the regression line. 9.10. (a) The point for Palm Beach county appears to be an outlier, with more votes for Buchanan than we would expect based on the number of votes for Perot. (b) ˆ y = 45.7 + 0.02414(30,739) = 788; ˆ y y- = 3407 – 788 = 2619; the number of Buchanan votes in Palm Beach county is 2619 higher than we would...
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This note was uploaded on 07/14/2011 for the course STA 101 taught by Professor Alan during the Fall '10 term at University of Florida.

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HW7-Solutions - STAT 101 Agresti Homework 7 Solutions...

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