One year, the mean age of an inmate on death row was 41.7 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 9.7. Construct a 95% confidence interval about the mean age. What does the interval imply?

Choose the correct hypotheses.

H0: _____

H1: _______

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.

What does the interval imply?

A. Since the mean age from the earlier year isnot contained in the interval, there isnot sufficient evidence to conclude that the mean age had changed.

B. Since the mean age from the earlier year is contained in the interval, there isnot sufficient evidence to conclude that the mean age had changed.

C. Since the mean age from the earlier year is contained in the interval, there is sufficient evidence to conclude that the mean age had changed.

D. Since the mean age from the earlier year isnot contained in the interval, there is sufficient evidence to conclude that the mean age had changed.