10.19 The pH of water coming out of a certain filtration plant is specified to be 7.0....
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10.19 The pH of water coming out of a certain filtration plant is specified to be 7.0. Thirty water samples independently selected from this plant show a mean pH of 6.8 and a standard deviation of 0.9.
Is there any reason to doubt that the plant’s specification is being maintained? Use . Find the p-value for this test.
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Related Book For
Probability And Statistics For Engineers
ISBN: 9781133006909
5th Edition
Authors: Richard L Scheaffer, Madhuri Mulekar, James T McClave, Cecie Starr
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