Historical data indicate that the standard deviation of a process is 6.3.a. A recent sample of size 29 produced a variance of 63.9. Test to determineif the variance has increased using a significance level of 0.05.b. A recent sample of size 9 produced a variance of 8.29. Test to determine ifthe variance has decreased using a significance level of 0.025.c. A recent sample of size 15 produced a variance of 60.7. Test to determine ifthe variance has changed using a significance level of 0.10.

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Answered: Historical data indicate that the…

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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Historical data indicate that the standard deviation of a process is 6.3. a. A recent sample of size 29 produced a variance of 63.9. Test to determine if the variance has increased using a significance level of 0.05.