SW%20Ex%20Sol%20Ch4-5

SW%20Ex%20Sol%20Ch4-5 - 1 Stock-Watson Chapter 4...

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Unformatted text preview: 1 Stock-Watson Chapter 4 & 5: Solutions to Selected Exercises Chapter 4 4.1. (a) The predicted average test score is & 520 4 5 82 22 392 36 TestScore = . - . = . (b) The predicted change in the classroom average test score is & ( 5 82 19) ( 5 82 23) 23 28 TestScore = - . - - . = . (c) Using the formula for in Equation (4.8), we know the sample average of the test scores across the 100 classrooms is 1 520 4 5 82 21 4 395 85 TestScore CS = + = . - . . = . . 4.2. The sample size 200. n = The estimated regression equation is gG uuU Uu G U U (a) Substituting 70, 65, and 74 Height = inches into the equation, the predicted weights are 176.39, 156.69, and 192.15 pounds. (b) & 3 94 3 94 1 5 5 91. Weight Height = . = . . = . (c) We have the following relations: 1 2 54 and1 0 4536 . in cm lb kg = . = . Suppose the regression equation in the centimeter-kilogram space is & 1...
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This document was uploaded on 10/29/2008.

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SW%20Ex%20Sol%20Ch4-5 - 1 Stock-Watson Chapter 4...

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