A multiple regression equation is computed for a sample of n = 20 sets of X₁,X₂,and Y scores.If the significance of the regression equation is evaluated using an F-ratio,then the ratio would have degrees of freedom equal to ____. A)df = 1, 18 B)df = 1, 19 C)df = 2, 17 D)df = 2, 18

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The degrees of freedom for an F-ratio in multiple regression are determined by the number of predictors and the sample size. With 2 predictors (X1 and X2) and a sample size of n = 20, the degrees of freedom for the numerator (number of predictors) is 2, and for the denominator (n - number of predictors - 1), it is 20 - 2 - 1 = 17.

A Multiple Regression Equation Is Computed for a Sample of N