If you look at percentage rates, the self-selection of the candidates might make it look like it is not so rigoristic. But take a look at the absolute numbers, for example for the "SAT Reasoning Test Scores (Math)":
1172 / (1172 + 269 + 108 + 2) =~ 0.76
So 76% of the students enrolled have scores in the best 750-800 range.
http://www.mitadmissions.org/topics/apply/admissions_statist...
If you look at percentage rates, the self-selection of the candidates might make it look like it is not so rigoristic. But take a look at the absolute numbers, for example for the "SAT Reasoning Test Scores (Math)":
1172 / (1172 + 269 + 108 + 2) =~ 0.76
So 76% of the students enrolled have scores in the best 750-800 range.