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Several years​ ago, the reported mean age of an inmate on death row was

38.7 years. A sociologist wondered whether the mean age of a​ death-row inmate has changed since then.

He randomly selects 37 ​death-row inmates and finds that their mean age is 36.9 with a standard deviation of 8.8

Construct a 90​% confidence interval about the mean age of death row inmates. What does the interval​ imply?

Choose the correct hypotheses.

Upper H 0   

μ = 38.7



(I've edited this to remove the repeated numbers.  I hope it is now clearer, and that I haven't changed the meaning of anything in doing so!     Alan)

 Nov 21, 2018
edited by Alan  Nov 22, 2018
edited by Alan  Nov 22, 2018

Please restate your question with proper wording. I cannot understand your question. 


- PM

 Nov 22, 2018

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