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 am not sure how to input this into excel.