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Problem 2-2, Comparing a single mean to a specified value (second example)
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==Problem Statement== ''The viscosity of a liquid detergent is supposed to average 800 centistokes at 25 Β°C. A random sample of 16 batches of detergent is collected, and the average viscosity is 812. Suppose we know that the standard deviation of viscosity is Ο = 25 centistokes.'' <ol style="list-style-type:lower-latin"> <li>''State the hypotheses that should be tested.''</li> <li>''Test these hypotheses using Ξ± = 0.05. What are your conclusions?''</li> <li>''What is the P-value for the test?''</li> <li>''Find a 95 percent confidence interval on the mean.''</li> </ol>
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