Question 865027
Suppose the alternative hypothesis in a hypothesis test is "the population mean is greater than 60". 
Comment: This implies the test is a right-tail test.
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If the sample size is 80, σ is known, and alpha = .01, the critical value of z is invNorm(0.99) = 2.3263
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Cheers,
Stan H.
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a. 2.575
b. -2.575
c. 2.33 
d. 2.45