Roger A. Wojtkiewicz is Professor in the Department of Sociology at Ball State University in Muncie Indiana. He spent the first twelve years of his career in the Department of Sociology at Louisiana State University and has since been at Ball State where he served as department chairperson for twelve years. At LSU, he taught undergraduate statistics and a graduate course in regression modeling in the PhD program. It was at LSU where he began the development of the ideas contained in the book. At Ball State, he has taught both the first and second semester courses in the statistics sequence in