1960 was a vastly different culture than even the 1980’s. Too many women were not encouraged to go to college and not allowed at so many- there were men’s and women’s colleges. That alone skews results. I know that a decade later things were changing but even in the early 1970’s options for young women were not there and financial need meant not bothering. Information was print only- snail mail, catalogs, newspaper articles so changes took a lot longer to reach people out of an area.
It is an awakening to be 65 and hear from women only five years older- my watershed years did change things. Girls who were not allowed to take HS Chemistry (hey- AP classes were even after my time). I had thought that kind of thinking was late 1940’s when my mother should have taken math and such in college. Women’s Lib was a real force in my HS-college years (as was Vietnam and Civil Rights).
So- those SAT scores (and ACT) were mostly for men. I’ll bet there were disproportionate numbers of high scoring women since so many would not have bothered with it. As above somewhere- there was no test prep, repeat takes back then either. Test were truly a snapshot, not a studio portrait.