Q311kV SF6 circuit breakers in electrical distribution substations in an industrial park mustbe periodically maintained to prevent unexpected faults. An engineer claims that onaverage, the circuit breakers will fail less than 10 months after the last maintenance workdue to the surrounding atmospheric conditions. Based on his claim, he suggests to reducepreventive maintenance cycle time. From a sample of 30 circuit breakers, the meanoperating hours before circuit breaker failure is 6845 hours with a standard deviation of766 hours. Let X is the average operating hours before fail and a=0.05. Assume 30 daysper month in the calculation.(a) Write the null hypothesis, alternative hypothesis and claim for X.(b)(c)(d)(e)Determine the test types and data.Calculate the critical value and the test statistics.Evaluate the decision using the graph.Conclude the hypothesis test for Xda

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Answered: Q3 11kV SF6 circuit breakers in…

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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