Question

How much sleep do you get on a typical school night? A group of 10 college students were asked to report the number of hours that they slept on the previous night with the following results.
7.25, 6.25, 7.5, 7.25, 8.75, 4.75, 8.25, 7.25, 7, 6.25

(a)
Find a 99% confidence interval for the average number of hours that college students sleep.
_________ to __________

(b)
What assumptions are required in order for this confidence interval to be valid? (Select all that apply.)
1. The population of students the sample was selected from is normally distributed with respect to time spent sleeping.
2. The population of students the sample was selected from follows a t distribution with respect to time spent sleeping.
3. The sample of 10 students was randomly selected.
4. The sample of 10 students are all from different colleges.
5. The population of students the sample was selected from is uniformly distributed with respect to time spent sleeping.
Incorrect: Your answer is incorrect.

Answer 1