I'd assume 90% of CS & MechEng students are men (if it's anything like my classes) and women are more likely to take economics and linguistics. So maybe the net just detected the gender and made assumptions based on how likely it is for a man/woman to be in each course
I think it would be interesting to see the same thing but men and women separated at the start or equal amounts of students by gender per course.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.