GARP Risk And AI (RAI) Practice Exam

In multiple regression, each coefficient represents the effect of one predictor on the outcome, holding all other predictors constant. It’s the amount the predicted dependent variable changes for a one-unit increase in that predictor, with every other predictor kept fixed. This is a partial or conditional effect: it isolates the influence of that specific variable from the others in the model. Important complements: dummy-variable terms are used to encode categories, and their coefficients reflect differences from a reference group. The intercept is a separate term that estimates the expected outcome when all predictors are zero. Non-linear terms (like squares or interactions) introduce curvature or interactions, with their own coefficients describing those non-linear effects. The coefficients in a linear multiple regression specifically quantify the linear contribution of each predictor to the outcome, given the presence of the others.