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Ozone The Environmental Protection Agency is examining the relationship between the

Stats Modeling the World | 4th Edition | ISBN: 9780321854018 | Authors: David E. Bock, Paul F. Velleman, Richard D. De Veaux ISBN: 9780321854018 481

Solution for problem 39 Chapter 26

Stats Modeling the World | 4th Edition

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Stats Modeling the World | 4th Edition | ISBN: 9780321854018 | Authors: David E. Bock, Paul F. Velleman, Richard D. De Veaux

Stats Modeling the World | 4th Edition

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Problem 39

Ozone The Environmental Protection Agency is examining the relationship between the ozone level (in parts per million) and the population (in millions) of U.S. cities. Part of the regression analysis is shown. Dependent variable is: Ozone R-squared = 84.4% s = 5.454 with 16 - 2 = 14 df Variable Coefficient SE(Coeff) Intercept 18.892 2.395 Pop 6.650 1.910 a) We suspect that the greater the population of a city, the higher its ozone level. Is the relationship significant? Assuming the conditions for inference are satisfied, test an appropriate hypothesis and state your conclusion in context. b) Do you think that the population of a city is a useful predictor of ozone level? Use the values of both R2 and s in your explanation.

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Test Statistic  measures how far the sample data diverge from what we would expect should the null hypothesis be true  So, a test statistic with a high magnitude would show that the date is not consistent with H o P-values  the probability (when H0 I true) that the test statistic takes a value that is as extreme or more extreme than what is observed  A small p value means stronger evidence against Ho provided by the data, and you reject the null hypothesis Significance levels  Denoted by  Used as evidence for or against H 0  If a p value is smaller than , we reject H o  If the p value is larger that , we fail to rejectoH  If a significance level is not given, always assume = .05

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Chapter 26, Problem 39 is Solved
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Textbook: Stats Modeling the World
Edition: 4
Author: David E. Bock, Paul F. Velleman, Richard D. De Veaux
ISBN: 9780321854018

Stats Modeling the World was written by and is associated to the ISBN: 9780321854018. This full solution covers the following key subjects: . This expansive textbook survival guide covers 31 chapters, and 1357 solutions. This textbook survival guide was created for the textbook: Stats Modeling the World, edition: 4. The full step-by-step solution to problem: 39 from chapter: 26 was answered by , our top Statistics solution expert on 03/16/18, 04:57PM. The answer to “Ozone The Environmental Protection Agency is examining the relationship between the ozone level (in parts per million) and the population (in millions) of U.S. cities. Part of the regression analysis is shown. Dependent variable is: Ozone R-squared = 84.4% s = 5.454 with 16 - 2 = 14 df Variable Coefficient SE(Coeff) Intercept 18.892 2.395 Pop 6.650 1.910 a) We suspect that the greater the population of a city, the higher its ozone level. Is the relationship significant? Assuming the conditions for inference are satisfied, test an appropriate hypothesis and state your conclusion in context. b) Do you think that the population of a city is a useful predictor of ozone level? Use the values of both R2 and s in your explanation.” is broken down into a number of easy to follow steps, and 123 words. Since the solution to 39 from 26 chapter was answered, more than 232 students have viewed the full step-by-step answer.

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