Colleges work hard to convert offers of admission into acceptances. One college has been experimenting with phone calls from program faculty to prospective students to encourage students to accept offers of admission. In a random sample of 278 students who were called by program faculty, 234 sent acceptances. In a random sample of 302 students who were not called but received a package in the mail, 232 sent acceptances. Is there evidence that the pro portion of prospective students who send acceptances is higher when they get calls from program faculty? Use α = 2.5%.