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Level 1
· ◆◆ · ~11 min
The Regression Model
The Regression Model
"From a cloud of points to a model with a slope you can interpret — and the one assumption that makes it mean something."
dependent vs independent variablethe model y = β₀ + β₁x + uthe error term upopulation regression function E(y|x)zero conditional mean E(u|x) = 0
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.