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Complete parts A – D of question 45 from Chapter 7, page 444

    Complete parts A – D of question 45 from Chapter 7, page 444, using file P08_07.xlsx. Preview the document. View in a new windowP08_07.xlsx. Preview the document. View in a new window. Within the spreadsheet, include a brief explanation of what the data is telling you. No Word document is required for this assignment.45. The file P08_07.xlsx contains a random sample of 200 service times during the busiest hour of the day at a particular fast-food restaurant. Find a 95%confidence interval for each of the following population parameters. Then explain how each result might be useful to the manager of the restaurant in terms of improving service.a. The mean service time. The standard deviation of service times. The proportion of service times longer than90 seconds. The proportion of service times shorter than60 seconds

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