SAS Output 2 Sum of Source DF Squares Mean Square F Value Pr > F Model 1.26693001 <.0001 error corrected total r-square coeff var root mse speed mean source type ill ss square f value pr> F Age 3.22634279 3.22634279 259.25 <.0001 dominant age standard parameter estimate error t value pr> It| Intercept 0.2264932870 B 0.04482257 5.05 <.0001 age b dominant how many dummy variables need to be included in the model for tx varichs : tx1 sex d. e. cannot determined from given information what is estimated odds ratio reporting pain a compared old controlling all other a. c.>