Chapter 9 Practice Problems

Chapter 9 Practice Problems - Chapter 9 Practice Problems...

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Chapter 9: Practice Problems Q1. The manager of a travel agency is considering a new promotion plan in order to increase sales. Currently, the average sales rate per agent is 25 trips per month. The manager wants to determine whether the new promotion plan increases the average sales rate per agent. a. Develop the appropriate null and alternative hypotheses. b. What is the Type I error in this case? c. What is the Type II error in this case? Q2. According to the National Association of Colleges and Employers, the 2000 mean annual salary of business degree graduates in accounting was $37,000 ( Time , May 8, 2000). In a follow-up study in June 2001, a sample of 48 graduating accounting majors found a sample mean of $38,100 and a sample standard
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deviation of $5,200. Determine whether the mean annual salary of June 2001 graduates in accounting has increased compared to the 2000 mean annual salary. a.
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Chapter 9 Practice Problems - Chapter 9 Practice Problems...

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