Question 865027: Suppose the alternative hypothesis in a hypothesis test is "the population mean is greater than 60". If the sample size is 80, σ is known, and alpha = .01, the critical value of z is _______.
a. 2.575
b. -2.575
c. 2.33
d. 2.45
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 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
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