Question: In 2002 the mean age of an inmate on death
In 2002, the mean age of an inmate on death row was 40.7 years, according to data obtained from the U.S. Department of Justice. 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 38.9, with a standard deviation of 9.6. Construct a 95% conﬁdence interval about the mean age. What does the interval imply?
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