« Question 8 of 8 . Hint(s) Check My Work According to the University of Nevada Center for Logistics Management, 6% of a

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Question 8 Of 8 Hint S Check My Work According To The University Of Nevada Center For Logistics Management 6 Of A 1 (34.45 KiB) Viewed 29 times

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« Question 8 of 8 . Hint(s) Check My Work According to the University of Nevada Center for Logistics Management, 6% of all merchandise sold in the United States gets returned. A Houston department store sampled 80 items sold in January and found that 12 of the items were returned (a) Construct a point estimate of the proportion of items returned for the population of sales transactions at the Houston store. If required, round your answer to three decimal places. 0.15 (6) Construct a 95% confidence interval for the porportion of retums at the Houston store. If required, round your answer to three decimal places 0.2655 0.34 (c) is the proportion of returns at the Houston store significantly different from the returns for the nation as a whole? Provide statistical support for your to answer conclude that the return rate for the Houston store is We reject the null hypothesis. We can different than the U.S. national return rate. Hide Feedback Partially Correct Hint(s) Check My Work
The International Air Transport Association surveys business travelers to develop quality ratings for transattantic gateway airports. The maximum possible rating is 10. Suppose a simple random sample of 50 business travelers is selected and each traveler is asked to provide a rating for the Miami International Airport The ratings obtained from the sample of 50 business travelers follow Click on the datafile logo to reference the data. DATA file 6 4 6 7 4 8 7 6 8 3 10 3 B 7 5 3 8 5 4 7 5 8 5 4 9 8 4 2 5 9 4 4 8 5 8 9 6 9 6 8 5 7 10 9 9 8 3 9 Develop a 95% confidence interval estimate of the population mean rating for Miami. If required, round your answers to two decimal places. Do not round Intermediate calculations. 60.539 to 81.461 Hide Feedback Incorrect Check My Work
Health insurers are beginning to offer telemedicine services online that replace the common office visit. Wellpoint provides a video service that allows Subscribers to connect with a physician online and receive prescribed treatments. Wellpoint claims that users of its Live Health Online service saved a significant amount of money on a typical visit. The data shown below (s), for a sample of 20 onling doctor visits, are consistent with the savings per visit reported by Wellpoint. Click on the datafile logo to reference the data DATA file 92 34 40 105 83 55 56 49 40 76 48 96 93 74 73 78 93 100 53 82 Assuming that the population is roughly symmetric, construct a 95% confidence interval for the mean savings for a televisit to the doctor as opposed to an office visit. If required, round your answers to two decimal places 60.14 to 81.05 Hide Feedback Incorrect Hints) Check My Work