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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 fleet are out of operation if a random sample of 10 cars showed the following number of days that each had been inoperative. 19 18 17 13 30 11 10 24 State all assumptions. Select all the assumptions below. A. The sample comes from a normal population B. The sample size is at least 30 C. It is a random sample D. The variance is less than the mean 22 5 Find a 98% confidence interval for the population mean. The 98% confidence interval is from a lower limit of to an upper limit (Round to two decimal places as needed.) Q

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 fleet are out of operation if a random sample of 10 cars showed the following number of days that each had been inoperative. 19 18 17 13 30 11 10 24 State all assumptions. Select all the assumptions below. A. The sample comes from a normal population B. The sample size is at least 30 C. It is a random sample D. The variance is less than the mean 22 5 Find a 98% confidence interval for the population mean. The 98% confidence interval is from a lower limit of to an upper limit (Round to two decimal places as needed.) Q

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 fleet are out of operation if a random sample of 10 cars showed the following number of days that each had been inoperative. 17 13 30 10 19 24 18 11 State all assumptions. Select all the assumptions below. A. The sample comes from a normal population B. The sample size is at least 30 C. It is a random sample D. The variance is less than the mean Find a 98% confidence interval for the population mean. The 98% confidence interval is from a lower limit of (Round to two decimal places as needed.) 22 5 Ď to an upper limit of
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 fleet are out of operation if a random sample of 10 cars showed the following number of days that each had been inoperative. 17 13 30 10 19 24 18 11 State all assumptions. Select all the assumptions below. A. The sample comes from a normal population B. The sample size is at least 30 C. It is a random sample D. The variance is less than the mean Find a 98% confidence interval for the population mean. The 98% confidence interval is from a lower limit of (Round to two decimal places as needed.) 22 5 Ď to an upper limit of
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