At a factory, batteries are produced with a standard deviation of 3.2 months. In a sample of 81 batteries, the mean life expectancy is 15.6 months. Find a 90% confidence interval estimate for the life expectancy of all batteries produced at the plant.(15.523; 15.677)(15.535; 15.665)(14.903; 16.296)(15.015; 16.185)

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Answered: At a factory, batteries are produced…

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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At a factory, batteries are produced with a standard deviation of 3.2 months. In a sample of 81 batteries, the mean life expectancy is 15.6 months. Find a 90% confidence interval estimate for the life expectancy of all batteries produced at the plant. O (15.523; 15.677) O (15.535; 15.665)