1. You are interested in studying predictors (math94me, toinc93, and read94me) of the percentage graduating in 1994 (grad94). a. Examine univariate normality for each variable. What are your conclusions about the distributions? What transformations should be conducted? b. After making the necessary transformations, examine multivariate outliers using Mahaianobis distance. Which cases should be deleted? c. After deleting the muitivan'ate outliers, examine multivariate normality and linearity by creating a Scatterplot Matrix. d. Examine the variables for homoscedasticity by creating a residuals plot (standardized vs. predicted values). What are your conclusions about homosoedasticity