=+11.77 Are college students who take a freshman orientation course more or less likely to stay in college than those who do not take such a course? The article “A Longitudinal Study of the Retention and Academic Performance of Participants in Freshmen Orientation Courses”

(Journal of College Student Development [1994]: 444–

449) reported that 50 of 94 randomly selected students who did not participate in an orientation course returned for a second year. Of 94 randomly selected students who did take the orientation course, 56 returned for a second year. Construct a 95% confidence interval for p1 2 p2

,