Colleges do not release these statistics. But your friend should be aware that selective colleges have far more qualified candidates than they can accept. So they can pick and choose. A test score and GPA in the top 50% likely means their app will get a close look. But that is all it means. Quality of LORs, essays, and ECs are a factor. If they interviewed and it was evaluative, that matters. If the school is not need blind and the kid needs aid, that matters. If the kid is OOS for a top public, or provides geographic diversity to a private, that matters. And the quality of those same things from the rest of the applicant pool matter.
If your friend wants purely stats based admissions, they should look to Canadian universities.