A university is interested in whether there's a difference between students who live on campus and students who live off campus with respect to absenteeism. Over one semester, researchers take random samples of on-campus and off-campus students and record the following number of missed classes over a semester:

On-campus: (3, 4, 0, 6, 2, 1, 3, 3, 5, 2, 4, 4, 6, 5, 2

Off-campus: (6, 5, 2, 6, 2, 0, 7, 8, 1, 7, 2, 6, 5, 3, 2

D. Compute a 95% confidence interval for the difference between the number of classes missed by each group of students.

E. Compute a 90% confidence interval for the difference between the number of classes missed by each group of students. (2 points)

(If you help explain just either D or E, I could probably figure out the other one. Thank you!)