20. For each of the following,

(a) through (d), determine the multiple linear prediction rule for predicting criterion variable Y from predictor variables X 1, X 2, and X

3. Then

(e) figure the predicted score on the criterion variable for part

(a) for a person with scores on the predictor variables of X1 = 12, X2 = 8, and X 3 = 1.

Regression Constant Regression Coefficient Regression Coefficient Regression Coefficient a b1 b2 b3

(a) 3.8 4.1 .9 7.1

(b) 11.2 .9 2.5 3.9

(c) .8 .1 1.0 1.5

(d) -3.1 .8 12.4 4.3