About the Authors

Douglas Shafer is Professor of Mathematics at the University of North Carolina at Charlotte. In addition to his position in Charlotte, he has held visiting positions at the University of Missouri at Columbia, Montana State University, and had a Senior Fulbright Fellowship in Belgium. He teaches a range of mathematics courses as well as introductory statistics. In addition to journal articles and this statistics textbook, he has co-authored with V. G. Romanovski (Maribor, Slovenia) a graduate textbook in his research specialty. He earned a PhD in mathematics at the University of North Carolina at Chapel Hill. 

Zhiyi Zhang is Professor of Mathematics at the University of North Carolina at Charlotte. In addition to his teaching and research duties at the university, he consults actively with industries and governments on a wide range of statistical issues. His research activities in statistics have been supported by the National Science Foundation, U.S. Environmental Protection Agency, Office of Naval Research, and National Institute of Health. He earned a PhD in statistics at Rutgers University in New Jersey.