The Water Resource Department claims that the mean pH level of the river water is 6.8. You randomly select 19 water samples and measure the pHof each. The sample mean and standard deviation are 6.7 and 0.24. Is there enough evidence to reject the company's claim at 5% level ofsignificance?a. Which of the following statistical tests is most appropriate in this scenario?Two-Tailed Z-TestOne-Tailed Z-TestTwo-Tailed T-TestOne-Tailed T-Testb. What are the appropriate hypotheses for the test?O Ho : µ = 6.8 H1 : µ # 6.8Ho : µ + 6.8 H1 :µ = 6.8Ho : µ = 6.8 H1 : µ > 6.8O Ho : µ = 6.8 H1 : µ < 6.8c. After conducting the appropriate significance test, the test statistic was found to be -1.816.Therefore, the conclusion for the test is:Reject Ho, because p-value is less than 0.05O Fail to reject Ho, because -1.816 falls outside the critical regionReject H1, because -1.816 falls within the critical regionO Fail to reject Ho, because p-value is less than 0.05

Given,sample size(n)=19sample mean(x¯)=6.7sample standard deviation(s)=0.24population…

Answered: The Water Resource Department claims…

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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