Note that all of those appear to be over 100, which would suggest the average IQ for others would be under 100, making my point.
Obviously, some majors are tougher than others. But the middle of that graph is still significantly above average.
I'm surprised it's that high actually.
So, level of education does correlate with IQ, as I said. I'm sure if you looked at post graduate folks, you'd see even high IQs on average.