A simple random sample of 10 students is selected from College A. The number of

Question

A simple random sample of 10 students is selected from College A. The number of absent days during the last semester for each student was (sorted from the smallest to the largest)

0, 1, 2, 2, 2, 2, 3, 5, 6, and 7

Define µ the mean number of absent days for the college’s students.

1) Use sample mean to estimate µ. Is it an unbiased estimator for µ? Why or why not?

2) Report a point estimate for the SD of the absent days for the college, s.

3) Based on (b), report the S.E. of the point estimate in (a)

4) Assume that the number of absent days is normally distributed. Calculate its 95% confidence interval.

Do by hand, not input in calculator ****

Explanation / Answer

A simple random sample of 10 students is selected from College A. The number of

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