The population is normally distributed with a population standard deviation of 72

a. Use a 1% level of significance to determine the critical value(s) of the test. b-1. Calculate the value of the test statistic with formula x hat = 294 and n = 85.  b-2. What is the conclusion at α = 0.01? c. Use a 10% level of significance to determine the critical value(s) of the test. d-1. Calculate the value of the test statistic with formula x hat = 238 and n = 85. d-2. What is the conclusion at α = 0.10?

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