A wastewater treatment program is designed to produce treatedwater with a pH of
ID: 2914829 • Letter: A
Question
A wastewater treatment program is designed to produce treatedwater with a pH of 7. Let represent the mean pH of watertreated by this process. The pH of 60 water specimens will bemeasured, and a test of the hypothesis Ho: = 7 versus H1 : =/ 7 will be made. Assume it is known from previousexperiments that the standard deviation of the pH of waterspecimens in approximately 0.5. a.If the test is made at the 5% level, what is the rejectionregion? A wastewater treatment program is designed to produce treatedwater with a pH of 7. Let represent the mean pH of watertreated by this process. The pH of 60 water specimens will bemeasured, and a test of the hypothesis Ho: = 7 versus H1 : =/ 7 will be made. Assume it is known from previousexperiments that the standard deviation of the pH of waterspecimens in approximately 0.5. a.If the test is made at the 5% level, what is the rejectionregion?Explanation / Answer
The rejection region is z>z/2 = 1.96Related Questions
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