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    Critical value for Z test.

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    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:

    Ho: mean less than or = to 82 and Ha:mean is greater than 82, a=0.10

    Ho: mean=44 and Ha:mean is not equal to 44, a =0.01

    Ho: mean greater than or = to 17 and Ha:mean is less than 17, a=0.05

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    Step by step method for computing critical value for Z test is given in the answer.

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