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 90% 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. 13 16 30 22 12 5 14 15 20 17 O 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. The variance is less than the mean D. It is a random sample Find a 90% confidence interval for the population mean. The 90% confidence interval is from a lower limit of ton upper limit of (Round to two decimal places as needed.)
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 90% 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. 13 16 30 22 12 5 14 15 20 17 O 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. The variance is less than the mean D. It is a random sample Find a 90% confidence interval for the population mean. The 90% confidence interval is from a lower limit of ton upper limit of (Round to two decimal places as needed.)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 13PPS
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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 90%
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.
5
15
13 16
30
22 12
14
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. The variance is less than the mean
D. It is a random sample
20
17 O
CO
Find a 90% confidence interval for the population mean.
The 90% confidence interval is from a lower limit of to In upper limit of
(Round to two decimal places as needed.)](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F64dbc75c-ec03-4124-8bf2-313b0dd5b6c4%2F25dd1bc1-d79f-4c26-b62e-df1f77aa61bb%2Ff9rvpht_processed.jpeg&w=3840&q=75)
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 90%
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.
5
15
13 16
30
22 12
14
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. The variance is less than the mean
D. It is a random sample
20
17 O
CO
Find a 90% confidence interval for the population mean.
The 90% confidence interval is from a lower limit of to In upper limit of
(Round to two decimal places as needed.)
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