noun Statistics. a procedure for determining a relationship between a dependent variable, as predicted success in college, and an
independent variable, as a score on a scholastic aptitude test, for a given population. The relationship is expressed as an equation for a
line (regres·sion·line) or curve
(regres·sion·curve) in
which any coefficient
(regression coefficient) of the
independent variable in the equation has been determined from a sample population.