I think they look at a lot of things, including whether the person is likely to be a credit to the university. But like the others said, money, parentage, intelligence are all factors.
My dad went to Cornell . I know a lot of people who went to Ivy League because I live in the northeast and went to a real good high school and stuff. But I know no one who went to Harvard. It wasn’t the cool thing to do, go to Harvard from my high school. Well it just so happened everyone went to all the other Ivy League schools except Harvard. My neighbor went to Dartmouth. She’s four years younger than me though.
I think my graduating high school class, well it was very competitive we had the highest test scores of any public school in the state. I think 25 kids in our grade went to tier 1 schools: examples of tier 1 schools are Ivy League, Stanford, Vanderbilt, MIT, duke, wake forest, uva, university of St. Louis, rice, down to university of Michigan there abouts.
That’s like 1/8th of my graduating class went to those schools. Maybe the figure was even higher I forget but. High school was harder than college all things considered academic wise.