I think, back when you could do these studies without being called a racist, you needed an IQ of about 110 to be able to get through college and and IQ of about 118 to get through Medical school. As I recollect only about 16% of the population has an IQ over 110. 64% fall between 90 and 110, then the curve falls off pretty steeply. Only 16% above 110 and 2% over 120. The average IQ of a physician was around 118 -124 depending on schools and region.
Being able to do non-decimal fractions in your head was sort of a marker for having a 100 IQ. The average IQ in the USA is currently estimated to be 96. I think around WWll it was around 102 depending upon the region of the country.
These numbers all predate the modern affirmative action era.
It is interesting that you mention the IQ test.
That was basically outlawed in the seventies. I remember my mom telling stories about the IQ test at the company she worked at for at least seven years putting Dad through college. She tested higher than their engineers. When she left that company it took four people to do her job. They never paid her anywhere near that much!!!
Anyway, that old IQ test was a proxy for the college degree.
Guess what? Now the left has made a whole industry based on required indoctrination just to get a job. All because we can’t “discriminate” based on how smart you are.
The left has created a hell hole for education and the younger adults who will be creamed by all of this.