hw_05_sol - Homework 5 Covers Chapter 8 Use the Project...

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Homework 5 Covers Chapter 8 Use the Project Talent data set. The variable School Size is interpreted as follows: 1 = number of students is less than 100 2 = number of students is from 100 to 399 3 = number of students is 400 or more 1. A lack-of-fit test for the variable Reading indicates that a possible curvature exists. Without centering , create a new, second-order variable for Reading. Perform a multiple regression analysis using Math as predictor and the first and second order Reading variables. Select Options and select Variance Inflation Factor and Lack-of-Fit > Data Subsetting and answer the following questions. a. What are the VIF values for the two predictors? VIF = 31.560 b. Does this indicate the presence of Multicollinearity and support your answer? Yes, since the VIF is greater than 10 and the average VIF is much larger than 1. c. What is the p-value of the lack-of-fit test and what does this indicate about model fit? P >= 0.1 so no evidence of lack of fit. 2.
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This note was uploaded on 10/08/2010 for the course STAT 462 at Pennsylvania State University, University Park.

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hw_05_sol - Homework 5 Covers Chapter 8 Use the Project...

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