ndugu
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
2 Answers
Chiangmai
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 | |
Wonderful answer.. If for no other reason that you took the time to answer this question. It was over my head.
jermain
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