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    3. A random sample of 40 college students has a mean earnings of $3120 with a standard deviation of $677 over the summer months. Determine whether a normal distribution or a t-distribution should be used or whether neither of these can be used to construct a confidence interval
    A random sample of 40 college students has a mean earnings of $3120 with a standard deviation of $677 over the summer months. Determine whether a normal distribution or a t-distribution should be used or whether neither of these can be used to construct a confidence interval

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    0  Views: 2547 Answers: 2 Posted: 14 years ago
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      2 Answers

      Are you having us do your statistics homework, ndugu?  I struggled thru this course years ago and probably will continue to struggle today.


       


      Nonetheless, if you have the mean & standard deviation, you should be able to construct a normal distribution.  What you are saying here is:  How confident are we that, say, 90% of the college students' earnings to be $3120, plus or minus the standard deviation of $677.


       


      I would say Normal Distribution but I would pray like hell tonight and hope the teacher's sick tomorrow.

      14 years ago. Rating: 2
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        Jenn

        Wonderful answer.. If for no other reason that you took the time to answer this question. It was over my head.
        commented 14 years ago

        3118.24/3121.76

        12 years ago. Rating: 0
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