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    asizel's Avatar
    asizel Posts: 1, Reputation: 1
    New Member

    Jul 22, 2010, 08:05 AM
    1. A random sample .
    1. A random sample of size 49 is taken from a large population, measuring the time it takes to complete a driver’s license examination. The sample mean was found to be 47 minutes, and the sample standard deviation 5.89 minutes. Construct a 95% confidence interval around the sample mean. Be sure to show whether you use the t- or z- value, and what value you use. Even though you are normally “allowed” to use an approximate value of “t” or “z” for this percent confidence, I want you to use the exact value appropriate for these circumstances. Interpret the confidence interval in a single sentence. In another sentence, state why you used either the “t” or the “z”.
    JudyKayTee's Avatar
    JudyKayTee Posts: 46,503, Reputation: 4600
    Uber Member

    Jul 22, 2010, 08:14 AM

    Thanks for copying your homework. We don't do homework here.

    Maybe someone who has the time and patience will come along but I think we all did our own homework. Now it's time for you to do yours.

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