SOLUTION: What critical value for z would be used to test the hypotheses: Ho: mean >= 15 versus Ha: mean

SOLUTION: What critical value for z would be used to test the hypotheses: Ho: mean >= 15 versus Ha: mean < 15, for a = 0.01?

Question 812793: What critical value for z would be used to test the hypotheses: Ho: mean >= 15 versus Ha: mean < 15, for a = 0.01?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
What critical value for z would be used to test the hypotheses: Ho: mean >= 15 versus Ha: mean < 15, for a = 0.01?
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Ha tells you it is a left-tail test with 1% in the left tail.
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critical value:: z = invNorm(0.01) = -2.3263
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Cheers,
Stan H.
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