(Answered)-8.20 The file contains the overall miles per gallon (MPG) of 2010 small SUVs. Source: Data extracted

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8.20 The file contains the overall miles per gallon (MPG) of 2010 small SUVs. Source: Data extracted from “Vehicle Ratings,” Consumer Reports, April 2010, pp. 33–34. a. Construct a 95% confidence interval estimate for the population mean MPG of 2010 small SUVs, assuming a normal distribution. b. Interpret the interval constructed in (a). c. Compare the results in (a) to those in Problem 8.19(a). 8.21 Is there a difference in the yields of different types of investments? The file contains the yields for a money market account and a five-year certificate of deposit (CD) for 25 banks in the United States, as of March 29, 2010. Source: Data extracted from www.Bankrate.com, March 29, 2010. a. Construct a 95% confidence interval estimate for the mean yield of money market accounts. b. Construct a 95% confidence interval estimate for the mean yield of five-year certificates of deposits. c. Compare the results of (a) and (b). 8.22 One of the major measures of the quality of service provided by any organization is the speed with which it responds to customer complaints. A large family-held department store selling furniture and flooring, including carpet, had undergone a major expansion in the past several years. In

 

Solution ID:10137822 | Question answered on 16-Oct-2016

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