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Find a 95% confidence interval for the mean breaking strength. b)  Find a 99% confidence interval for the mean breaking strength. c)  Anengineerclaimsthatthemeanbreakingstrengthisbetween49.7kNand50.3kN.With what level of confidence can this statement be made?

Find a 95% confidence interval for the mean breaking strength. b)  Find a 99% confidence interval for the mean breaking strength. c)  Anengineerclaimsthatthemeanbreakingstrengthisbetween49.7kNand50.3kN.With what level of confidence can this statement be made?

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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  1. 3)  In a sample of 36 steel wires the sample mean (average) breaking strength was found to be 50 kN. Assume from past experience that the standard deviation is known to be 2 kN.

    1. a)  Find a 95% confidence interval for the mean breaking strength.

    2. b)  Find a 99% confidence interval for the mean breaking strength.

    3. c)  Anengineerclaimsthatthemeanbreakingstrengthisbetween49.7kNand50.3kN.With what level of confidence can this statement be made?

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