u/Formal-South5410

Currently reviewing for AP exams but I'm kind of lost for how to review for AP Stats. For the whole year my teacher kind of just taught us formulas and whatnot, but he never really taught us why we do the things we are doing aside from the basics. Is there a good place to learn more of the theory behind what I'm actually doing when I just throw out these equations? I don't just want a 5, I want to actually know what on earth is going on.