... and one on data analysis, seems to me artificial. Furthermore, many students take only one course in statistics and do not have time for two or more. Analysis of Data and the Practice ... to the prktice of statistics. It is in the analysis of real data that one sees the roles played by both formal theory and informal data analytic methods. I have organized this ... XVII regression and analysis of variance. Throughout this chapter, theoretical results are balanced by more qualitative data analytic procedures based on analysis of residuals....