Graduation Rates. Refer to Exercise A.45 on page A-15 regarding the relationship between college graduation rate and the predictor variables student-to-faculty ratio, percentage of freshmen in the top 10% of their high school class, and percentage of applicants accepted.
a. Obtain output similar to that in Output A.14 on page A-50 and Fig, A.8 on page A-51.
b. Perform a residual analysis to assess the assumptions of linearity of the regression equation, constancy of the conditional standard deviation, and normality of the conditional distributions. Check for outliers and influential observations.
c. Does your analysis in part (b) reveal any violations of the assumptions for multiple regression inferences? Explain your answer.
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Introductory Statistics (10th Edition)
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