A presidential candidate's aide estimates that, among all college students, the proportion who intend to vote in the upcoming election is at most 70%....

A presidential candidate's aide estimates that, among all college students, the proportion who intend to vote in the upcoming election is at most 70%. If 142 out of a random sample of 225 college students expressed an intent to vote, can the aide's estimate be rejected at the .05 level of significance?