6. GRE Scores The quantitative reasoning scores on the Graduate Record Examination (GRE)7 were recorded for students

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6. GRE Scores The quantitative reasoning scores on the Graduate Record Examination (GRE)7 were recorded for students admitted to three different graduate programs at a local university. These data were analyzed in Chapter 11 using the analysis of variance for a completely randomized design.

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a. Write the theoretical model relating the GRE score to the qualitative variable “graduate program” using two dummy (indicator) variables to represent the three graduate programs.

b. Use a computer package to analyze the data with a multiple regression analysis. Is there sufficient evidence to indicate a difference in the average scores between the students who have been admitted to the three graduate programs? Use a 5.05.

c. Comment on the fit of the model and any regression assumptions that may have been violated. Summarize your results in a report, including printouts and graphs if possible.

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Introduction To Probability And Statistics

ISBN: 9780357114469

15th Edition

Authors: William Mendenhall Iii , Robert Beaver , Barbara Beaver

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