Question 612666: Determine the critical region and critical values for z that would be used to test the null hypothesis at the given level of significance, as described in each of the following:
(A)Ho:u >_ 70 and Ho:u < 70 and a = 0.10
(B) Ho:u <_ 75 and Ho:u . 75 , a = 0.05
(C) Ho:u = 36 and Ha : u =/ 36 , a = 0.01
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Determine the critical region and critical values for z that would be used to test the null hypothesis at the given level of significance, as described in each of the following:
(A)Ho:u >_ 70 and Ho:u < 70 and a = 0.10
left-tail of 10%: z = invNorm(0.10) = -1.2816
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(B) Ho:u <_ 75 and Ho:u > 75 , a = 0.05
right-tail of 5% : invNorm(0.95) = 1.6451
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(C) Ho:u = 36 and Ha : u =/ 36 , a = 0.01
+/-left-tail of 0.995 = +/-invNorm(0.995) = +/-2.5758
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Cheers,
Stan H.
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