Harrigan University is a liberal arts university in the Mid-west that attempts to attract the highest quality students, especially from its region of the country. It has gathered data on 178 applicants who were accepted by Harrigan (a random sample from all acceptable applicants over the past

several years).

1. Calculate a 95% confidence interval for the proportion of all acceptable applicants who accept Harrigan's invitation to enroll. Do the same for all acceptable applicants with a combined score less than 330, with a combined score between 330 and 375, and then with a combined score greater than 375. (Note that 330 and 375 are approximately the first and third quartiles of the Combined Score variable.)

I'm a bit confused as to what the sample size should be. Should the sample size be the number of all accepted students meaning the 178 applicants? Or the number of students that accepted the college's offer to attend?