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One​ year, the mean age of an inmate on death row was 40.8 years. A sociologist...

One​ year, the mean age of an inmate on death row was 40.8 years. A sociologist wondered whether the mean age of a​ death-row inmate has changed since then. She randomly selects 32 ​death-row inmates and finds that their mean age is 40.3 with a standard deviation of 9.9 Construct a​ 95% confidence interval about the mean age. What does the interval​ imply?

Construct the correct hypthesis

A) H0 mu ___ ____

B) H1 mu ___ _____

C) Construct a 95% confidence interval about the mean age

upper bound:

lower bound:

D) What does the interval imply? Is there sufficient evidence?

Math   Statistics-And-Probability   
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