Considering the essence of 偏差値, my questions will have more to do with Japanese culture or even mathematics rather than Japanese itself ) If I'm not wrong, 偏差値２５ means extremely poor performance. According to the wiki, it means you're worse than 98% of the competitors.この記事 偏差値２５くらいにしか見えねえぞ
1. Why is there 偏差値 in Japanese schools in the first place?
2. When is it measured? I mean, every quiz or what?
3. The scale: is it a school-wide thing or limited to your class?
3. If I am a poor performer in terms of 偏差値, what consequences may it have? What if I am just an average guy who's ended up being among a bunch of ridiculously bright students? My hensachi would be pretty low! (a sidenote: a good title for a high school anime)