Posted by **Anonymous** on Friday, April 26, 2013 at 3:25pm.

A school psychologist reports that the mean number of hours the students at this school sleep each night is 8 hours. The students believe the mean is not 8 hours. To find an estimate of the true mean, they select a random sample of 15 students from their school and ask how many hours each slept last night. A stemplot and boxplot of the numbers of hours are shown here. t he sample mean is 6.67 hours with a sample standard deviation of 1.88 hours.

a. Verify that the conditions for computing a confidence interval are met in this case.

b. Compute and interpret a 95% confidence interval for the mean number of hours the students at this school sleep each night.

- AP Statistics -
**gbaby**, Tuesday, May 14, 2013 at 11:43am
A school psychologist reports that the mean number of hours the students at this school sleep each night is 8 hours. The students believe the mean is not 8 hours. To find an estimate of the true mean, they select a random sample of 15 students from their school and ask how many hours each slept last night. A stemplot and boxplot of the numbers of hours are shown here. T he sample mean is 6.67 hours with a sample standard deviation of 1.88 hours.

a. Verify that the conditions for computing a confidence interval are met in this case.

b. Compute and interpret a 95% confidence interval for the mean number of hours the students at this school sleep each night.

## Answer this Question

## Related Questions

- statistics - Question 1 A school psychologist reports that the mean number of ...
- statistics - The number of hours that college students sleep on a week night is...
- Math - Sorry about last post. :( Graph: Students Hours _______________ Jack | 4....
- statistics - researchers believe a new sleep on average 10 hours per night...
- Statistics - Suppose that hours of sleep per night for single adults between 30 ...
- statistics - College students average 7.8 hours of sleep per night with a ...
- statistics - (10 pts) Using diaries for many weeks, a study on the lifestyles of...
- Probability/Statistics - Using diaries for many weeks, a study on the lifestyles...
- Statistics - 28. A group of statistics students decided to conduct a survey at ...
- statistics - The Office of Student Services at a large western state university ...

More Related Questions