Those are pretty much all of the same things I had. The class I took was a college-level American course, which is probably about the same difficulty as your pre-university class, given America's poor education system.
So you guys didn't use charts? No histograms or bar charts or anything? Surely you drew out the normal curves. That's what really helped me solve a lot of problems. You know, actually drawing and looking at what I was supposed to be solving.
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