Whether they plan on getting a further degree and whether they actually do so, and in what, may differ. Teachers are often expected to get a masters, which is consistent with the large number of education majors at most schools. Psychology degree holders, another popular major, require at least a masters for licensure in counseling or social work. Criminal justice and phys ed majors probably pursue masters in those fields.
Presumably proportionately more T25 students pursue phd degrees or law/business/med schools, at least in the past, though with highly lucrative jobs available to them upon graduation, that may no longer be as common. As long as the trifecta of finance, consulting and tech remain busy recruiters there, much less pressure to attend grad school, at least not right away.