One year, the mean age of an inmate on death row was 39.9
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
38.3, with a standard deviation of 8.9.
Construct a 95% confidence interval about the mean age.
What does the interval imply?
Construct a 95% confidence interval about the mean
age.
With 95% confidence, the mean age of a death row inmate is
between ( ) years and ( ) years. (Round
to two decimal places as needed.)