For Questions Use the Following Narrative

For Questions use the following narrative
Narrative: Quiz times
The introductory biology class at a large university is taught to hundreds of students each semester.For planning purposes, the instructor wants to find out the average amount of time that students would use to take the first quiz, if they could have as long as necessary to take it.She takes a random sample of 100 students from this population and finds that their average time for taking the quiz is 24 minutes, and the standard deviation is 16 minutes.
-{Quiz times narrative} Find a 95% confidence interval for the average time to take this quiz for the whole population of students who take the class.