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Refer to Exercises 3 and 4. An atmospheric scientist

Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi ISBN: 9780073401331 38

Solution for problem 5E Chapter 7.3

Statistics for Engineers and Scientists | 4th Edition

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Statistics for Engineers and Scientists | 4th Edition | ISBN: 9780073401331 | Authors: William Navidi

Statistics for Engineers and Scientists | 4th Edition

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Problem 5E

Refer to Exercises 3 and 4. An atmospheric scientist notices that the slope of the least-squares line in the study described in Exercise 4 differs from the one in the study described in Exercise 3. He wishes to test the hypothesis that the effect of humidity on ozone level differs between the two cities. Let βA denote the change in ozone level associated with an increase of 1 percent relative humidity for the city in Exercise 3, and βB denote the corresponding increase for the city in Exercise 4.

a. Express the null hypothesis to be tested in terms of βA and βB.

R-Sq(adj) = 8.9%

b. Let  and  denote the slopes of the least-squares lines. Assume these slopes are independent. There are 120 observations in each data set. Test the null hypothesis in pan (a). Can you conclude that the effect of humidity differs between the two cities?

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Chapter 7.3, Problem 5E is Solved
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Textbook: Statistics for Engineers and Scientists
Edition: 4
Author: William Navidi
ISBN: 9780073401331

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Refer to Exercises 3 and 4. An atmospheric scientist

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