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Level 17 · ◆◆◆ · ~12 min

The Correlation Coefficient

The Correlation Coefficient

"One number, r, from −1 to +1 — how it's built and what it ignores."

correlation coefficient rrange −1 to +1unitlesssensitivity to outliers
🚀 You're jumping ahead. This builds on Scatter Diagrams & Association — 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.