The work has not been graded but I like the output that was submitted to me. Is it possible for the same prof to do the next assignment I will be submitting? If possible, I will greatly appreciate it.
A random sample of 27 items is drawn from a population whose standard deviation is unknown. The sample mean is = 940 and the sample standard deviation is s = 15. Use Appendix D to find the values of Student’s t.
(a)Construct an interval estimate of μ with 99% confidence.
(b)Construct an interval estimate of μ with 99% confidence, assuming that s = 30.
(c)Construct an interval estimate of μ with 99% confidence, assuming that s = 60.
(d)Describe how the confidence interval changes as s increases.
The interval stays the same as s increases.
The interval gets wider as s increases.
The interval gets narrower as s increases.
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