David M. Levine is Professor Emeritus of Statistics and Computer Information Systems at Bernard M. Baruch College (City University of New York). He is nationally recognized as a leading innovator in business statistics education and is coauthor of such best-selling statistics textbooks as Statistics for Managers Using Microsoft Excel, Basic Business Statistics: Concepts and Applications, Business Statistics: A First Course, and Applied Statistics for Engineers and Scientists Using Microsoft Excel and Minitab. David F. Stephan is an instructional designer who has pioneered the classroom use of technology and is a leader in making Excel more accessible to statistics students. He has coauthored several textbooks with David M. Levine.