19. Age of Death-Row Inmates In 2002, the mean age of an inmate on death row was 40.7 years, according to data 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?
Added by Christopher B.
Close
Step 1
We are given the sample mean (38.9), sample standard deviation (9.6), and sample size (32). We want to construct a 95% confidence interval for the population mean. Show more…
Show all steps
Your feedback will help us improve your experience
Robin Corrigan and 57 other Intro Stats / AP Statistics educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Age of Death-Row Inmates In $2002,$ the mean age of an inmate on death row was 40.7 years, according to data 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?
Hypothesis Tests Regarding a Parameter
Hypothesis Tests for a Population Mean
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?
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.)
T. L.
Recommended Textbooks
Elementary Statistics a Step by Step Approach
The Practice of Statistics for AP
Introductory Statistics
Transcript
Watch the video solution with this free unlock.
EMAIL
PASSWORD