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 classes each student misses.
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)
a)...