Kenneth J. Berry is Professor Emeritus in the Department of Sociology at Colorado State University. He is the author of eight books and over 190 journal articles, primarily in the areas of statistics and quantitative research methods.
Janis E. Johnston is employed by the U.S. Government and is an Affiliate Faculty member in the Department of Sociology at Colorado State University. She is the author of six books and over 40 journal articles, primarily in the areas of statistics and quantitative research methods.