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A manufacturer of Li-based batteries claims that their newly designed batteries will last, on average, 5 years with a standard deviation of 1 year. A random sample of 9 of these batteries was tested and found to have the following expected lifetimes in years: 4.0, 3.0, 6.8, 7.9, 6.0, 3.7, 3.4, 4.6, 5.7 Determine the 95 % confidence interval of standard deviation (variability) of the battery life. O (-1.1,3.2) (3.8, 6.2) O (1.1, 3.2) O (0.8, 2.1)

A manufacturer of Li-based batteries claims that their newly designed batteries will last, on average, 5 years with a standard deviation of 1 year. A random sample of 9 of these batteries was tested and found to have the following expected lifetimes in years: 4.0, 3.0, 6.8, 7.9, 6.0, 3.7, 3.4, 4.6, 5.7 Determine the 95 % confidence interval of standard deviation (variability) of the battery life. O (-1.1,3.2) (3.8, 6.2) O (1.1, 3.2) O (0.8, 2.1)

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A manufacturer of Li-based batteries claims that their newly designed batteries will last, on average, 5 years with a standard deviation of 1 year. A random sample of 9 of these batteries was tested and found to have the following expected lifetimes in years: 4.0, 3.0, 6.8, 7.9, 6.0, 3.7, 3.4, 4.6, 5.7 Determine the 95 % confidence interval of standard deviation (variability) of the battery life. O (-1.1, 3.2) O (3.8, 6.2) O (1.1, 3.2) O (0.8, 2.1)
Transcribed Image Text:A manufacturer of Li-based batteries claims that their newly designed batteries will last, on average, 5 years with a standard deviation of 1 year. A random sample of 9 of these batteries was tested and found to have the following expected lifetimes in years: 4.0, 3.0, 6.8, 7.9, 6.0, 3.7, 3.4, 4.6, 5.7 Determine the 95 % confidence interval of standard deviation (variability) of the battery life. O (-1.1, 3.2) O (3.8, 6.2) O (1.1, 3.2) O (0.8, 2.1)
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