Afriend claims that education (years of school) is normally distributed. you believe she's wrong. a reasonable argument for your point of view is that:

She is wrong because . Education has several modes (for example, at 12 and 16 years).
The amount of years you spent in pursuing a certain education usually depended on the majors that you take in your college. STEM related majors tend to require longer years compared to social related majors. But STEM related majors tend to give bigger return on investment.