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You are given a sample of 36 values with a standard deviation of 21. The mean population is uknown. 1. At which z values

You are given a sample of 36 values with a standard deviation of 21. The mean population is uknown. 1. At which z values would you reject null hypothesis = 50 at the 91% confidence level? The alternative hypothesis is < 50. 2. If the true population mean value is 43, what is the probabilty of making type two error in this test? 3. What would be the power of this test?

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