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The multiple regression equation expresses the outcome variable as an additive combination of several predictor variables. Its general form is: $$Y = b_1X_1 + b_2X_2 + b_3X_3 + \dots + b_iX_i$$, where $$Y$$ is the predicted outcome, the $$X$$ terms are the individual predictor variables, and the corresponding $$b$$ terms are their regression weights.

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