Introductory Statistics (10th Edition)
10th Edition
ISBN: 9780321989178
Author: Neil A. Weiss
Publisher: PEARSON
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Chapter B.5, Problem 102E
Suppose that x1, x2, x3, and x4 are predictor variables for a response variable y. The following table contains the t-statistics for the utility of individual predictor variables for regression equations that involve each predictor variable, each pair of predictor variables, each triple of predictor variables, and all four predictor variables.
Use this table to do the following.
- a. Use the forward selection method to obtain a regression equation. (Take tenter = 2.00.)
- b. Use the backward elimination method to obtain a regression equation. (Take tremove = 2.00.)
- c. Use stepwise regression to obtain a regression equation. (Take tenter = tremove = 2.00.)
- d. Are the regression equations obtained in parts (a), (b), and (c) the same?
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Chapter B Solutions
Introductory Statistics (10th Edition)
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Ch. B.1 - In each of Exercises B.5B.14, a. decide whether...Ch. B.1 - Prob. 12ECh. B.1 - In each of Exercises B.5B.14, a. decide whether...Ch. B.1 - In each of Exercises B.5B.14, a. decide whether...Ch. B.1 - Consider the scatterplot of y versus x in Output...Ch. B.1 - Consider the scatterplot of y versus x in Output...Ch. B.1 - Prob. 17ECh. B.1 - Prob. 18ECh. B.1 - If one or both of the assumptions of...Ch. B.1 - Prob. 20ECh. B.1 - Prob. 21ECh. B.1 - Prob. 22ECh. B.1 - Prob. 23ECh. B.1 - Gasoline Mileage Ratings. Gasoline mileage and...Ch. B.1 - Hip Fracture Rates. In the paper Very Low Rates of...Ch. B.1 - Prob. 26ECh. B.1 - Prob. 27ECh. B.1 - Prob. 28ECh. B.1 - Prob. 29ECh. B.1 - Gasoline Mileage Ratings. Refer to Exercise B.24,...Ch. B.1 - Hip Fracture Rates. Refer to Exercise B.25, where...Ch. B.1 - Drosophila Life-span. In the paper Extended...Ch. B.1 - Protein Content of Wheat. In their text, Methods...Ch. B.1 - Pine Tree Volume. Table B.2 on page B-5 provides...Ch. 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