Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation σ. Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation. The mean replacement time for a random sample of 20 washing machines is 11.6 years and the standard deviation is 2.2 years. Construct a 99% confidence interval for the standard deviation, σ, of the replacement times of all washing machines of this type.
Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation σ. Assume that the population has a normal distribution. Round the confidence interval limits to the same number of decimal places as the sample standard deviation. The mean replacement time for a random sample of 20 washing machines is 11.6 years and the standard deviation is 2.2 years. Construct a 99% confidence interval for the standard deviation, σ, of the replacement times of all washing machines of this type.
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 4CYU
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Use the given degree of confidence and sample data to find a confidence interval for the population standard deviation σ. Assume that the population has a
The mean replacement time for a random sample of 20 washing machines is 11.6 years and the standard deviation is 2.2 years. Construct a 99% confidence interval for the standard deviation, σ, of the replacement times of all washing machines of this type.
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