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A car rental company is interested in the amount of time its vehicles are out of operation for repair work State all assumptions and find a 98% confidence interval for the mean number of days in a year that all vehicles in the company's feet are out of operation if a random sample of 10 cars showed the following number of days that each had been inoperative 21 15 19 17 11 10 29 18 23 6

A car rental company is interested in the amount of time its vehicles are out of operation for repair work State all assumptions and find a 98% confidence interval for the mean number of days in a year that all vehicles in the company's feet are out of operation if a random sample of 10 cars showed the following number of days that each had been inoperative 21 15 19 17 11 10 29 18 23 6

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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A car-rental company is interested in the amount of time its vehicles are out of operation for repair work. State all assumptions and find a 98% confidence interval for the mean number of days in a year that all vehicles in the company's feet are out of operation if a random sample of 10 cars showed the following number of days that each had been inoperative. 21 15 19 17 11 10 29 18 23 6 State all assumptions Select all the assumptions below As a random sample The sample comes from a normal population DC The variance is less than the mean D. The sample size is at least 30 Find a 98% confidence interval for the population mean The 90% confidence interval is from a lower limit of to an upper limit of (Round to two decimal places as needed)
Transcribed Image Text:A car-rental company is interested in the amount of time its vehicles are out of operation for repair work. State all assumptions and find a 98% confidence interval for the mean number of days in a year that all vehicles in the company's feet are out of operation if a random sample of 10 cars showed the following number of days that each had been inoperative. 21 15 19 17 11 10 29 18 23 6 State all assumptions Select all the assumptions below As a random sample The sample comes from a normal population DC The variance is less than the mean D. The sample size is at least 30 Find a 98% confidence interval for the population mean The 90% confidence interval is from a lower limit of to an upper limit of (Round to two decimal places as needed)
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