A researcher conducted a research at alocal high school wherein she found outthat, among the 150 randomrespondents,the average number oftexts sent is 135 with a samplestandard deviation of 30. Thepopulation mean is 140. Use 1% level ofsignificance. Find the z-value.)

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Answered: A researcher conducted a research at a…

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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A researcher conducted a research at a local high school wherein she found out that, among the 150 random the average number of respondents, texts sent is 135 with a sample standard deviation of 30. The population mean is 140. Use 1% level of significance. Find the z-value.