13. We explore a regression model examining the association between body mass index (the response variable), and the two predictors Race and Gender. The variable definitions are: bmi: This is the body mass index measured before the exercise program, Gender: A categorical predictor (i.e., a factor) coded Male and Female. Race: a categorical predictor coded African Am, Asian, Caucasian, Hispanic, Other. Here is the regression model: Coefficients : Estimate Std. Error t value Pr (>It|) (Intercept) 24. 785 0. 694 35. 73