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    Hypothesis test

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    An office equipment company advertises that it will deliver equipment within 15 days of purchase. A sample of 49 past deliveries is taken to test whether company's advertisement is valid. The delivery time for this sample was 16.2 days with a sample standard deviation of 5.6 days. Which of the following is correct

    * What is the null?

    * If test of hypothesis at 5% level of significance is desired, what is (are) the critical value(s) for test statistics?

    1.96

    -1.96

    +1.96

    1.645

    -1.645

    +1.645

    None of the above answers is correct
    *****************************************
    * What is the test statistic value?

    1.5

    1.6

    1.7

    1.8

    1.9

    2.0

    None of the above answers is correct
    ******************************************
    * ASSUMING that null hypothesis can not be rejected, what statement can be made concerning validity of company advertisement?

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    An office equipment company advertises that it will deliver equipment within 15 days of purchase. A sample of 49 past deliveries is taken to test whether company's advertisement is valid. The delivery time for this sample was ...

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