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The level of confidence is %.

The level of confidence is %.

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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Please include formula and calculation, and also Mention the value which you take from Outside.
In a sample of 80 light bulbs, the mean lifetime was 1217 hours with a standard deviation of 53 hours. An engineer claims that the mean lifetime is between 1208 and 1226 hours. With what level of confidence can this statement be made? (Express the final answer as a percent and round to two decimal places.) The level of confidence is
Transcribed Image Text:In a sample of 80 light bulbs, the mean lifetime was 1217 hours with a standard deviation of 53 hours. An engineer claims that the mean lifetime is between 1208 and 1226 hours. With what level of confidence can this statement be made? (Express the final answer as a percent and round to two decimal places.) The level of confidence is
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