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 We are interested in conducting a test with the following hypothesis: H0: mu = 20 vs

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 We are interested in conducting a test with the following hypothesis: H0: mu = 20 vs. Ha: mu > 20. If the sample size is 15, sample standard deviation is 12 and the level of significance is 0.05. What is the rejection region for this test? 2. The manufacturer of a refrigerator system for beer kegs produces refrigerators that are supposed to maintain a true mean temperature of 45 °F, ideal for a certain type of German pilsner. The owner of the brewery does not agree with the refrigerator manufacturer, and claims he can prove that the true mean temperature is incorrect. Identify the type I and II errors for the test.