Question

One? year, the mean age of an inmate on death row was 41.241.2 years. A sociologist...

One? year, the mean age of an inmate on death row was

41.241.2

years. A sociologist wondered whether the mean age of a? death-row inmate has changed since then. She randomly selects

3232

?death-row inmates and finds that their mean age is

40.440.4?,

with a standard deviation of

9.29.2.

Construct a? 95% confidence interval about the mean age. What does the interval? imply?

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