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Level 15 · 👑 WORLD EXAM · ◆◆◆ · ~10 min

Normal Curve Exam

World 3 Exam — The Normal Curve

"Standard units, the 68-95-99.7 rule, percentiles, and chances on the curve."

standard units68-95-99.7 rulepercentilesnormal approximationEV and SE
🚀 You're jumping ahead. This builds on The Normal Approximation for Chances — but play it now and you'll still earn full XP. If it feels steep, those make a gentler on-ramp.

A short lesson, then a quiz. ❤️×3 — a wrong answer costs a heart; finish with at least one left and the level is yours. Lose all three and you'll have to try again. Replay any time — XP and cleared levels are never lost.