Several years ago, the reported mean age of an inmate on death row was 44.9 years. A sociologist wondered whether the mean age of a death-row inmate has changed since then. He randomly selects 32 death-row inmates and finds that their mean age is 43.1, with a standard deviation of 8.8.
Construct a 99% confidence interval about the mean age of death row inmates. What does the interval imply?
(_ , _)
(Use ascending order. Round to two decimal places as needed.)
What does the interval imply?
A. Since the given mean age is in the interval, do not reject the null hypothesis.
B. Since the given mean age is in the interval, reject the null hypothesis.
C. Since the given mean age is not in the interval, reject the null hypothesis.
D. Since the given mean age is not in the interval, do not reject the null hypothesis.
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