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Topic:
Least-Squares Regression Lines
Why the Fitted Line Passes Through the Mean Point
Why Least Squares Squares the Errors
Why Extrapolated Predictions Can Mislead
Why a Regression Line Is Not a Perfect Fit
Why a Regression Line Need Not Pass Through the Origin
What Least Squares Minimizes
The Least-Squares Regression Line
Rounding and Reporting Regression Predictions
Residuals as Signed Prediction Errors
Regression Lines Are Directional, Not Reversible
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