Statistics: The Art and Science of Learning From Data, Books a la Carte Edition (4th Edition)

4th Edition

ISBN: 9780133860825

Author: Alan Agresti, Christine A. Franklin, Bernhard Klingenberg

Publisher: PEARSON

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Textbook Question

Chapter 13.3, Problem 21PB

Study time help GPA? Refer to the previous exercise.

a. Report and interpret the P-value for testing the hypothesis that the population slope coefficient for study time equals 0.
b. Find a 95% confidence interval for the true slope for study time. Explain how the result is in accord with the result of the test in part a.
c. Does the result in part a imply that in the corresponding population, study time has no association with college GPA? Explain. (Hint: What is the impact of also having HSGPA in the model?)

13.20 Predicting GPA For the 59 observations in the Georgia Student Survey data file on the book’s website, the result of regressing college GPA on high school GPA and study time follows.

Regression Equation

CGPA = 1.126 + 0.643 HSGPA + 0.0078 Studytime

Coefficients

Chapter 13.3, Problem 21PB, Study time help GPA? Refer to the previous exercise. a. Report and interpret the P-value for testing

a. Explain in nontechnical terms what it means if the population slope coefficient for high school GPA equals 0.
b. Show all steps for testing the hypothesis that this slope equals 0.

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Chapter 13.3, Problem 20PB

Chapter 13.3, Problem 22PB

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Chapter 13 Solutions

Statistics: The Art and Science of Learning From Data, Books a la Carte Edition (4th Edition)

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Solution Summary: The author identifies the P-value for testing the hypothesis that the population slope coefficient for study time is equal to 0 and interprets it.

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Chapter 13 Solutions