Practical Regression and Anova using R Julian J. Faraway July 2002 Contents 1 Introduction 8 1.1 Before you start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 1.1.1 Formulation . . . . . . . . . . . . . . . . .