Theory and Design for Mechanical Measurements
6th Edition
ISBN: 9781118881279
Author: Richard S. Figliola, Donald E. Beasley
Publisher: WILEY
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Chapter 4, Problem 4.52P
An engineer takes water samples from 15 lakes in the southern Appalachian mountains region to test for acidity. If the pH is greater than 6, then the lakes are, on average, nonacidic. The engineer finds a mean pH of 6.3 with a sample standard deviation of 0.672. Can the engineer conclude that on average, the lakes are not acidic at the 5% significance level? Set up a single-tailed hypothesis test to justify your answer. (Note: The critical value is 1.761 for a = 0.05.)
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Chapter 4 Solutions
Theory and Design for Mechanical Measurements
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