About These Authors
Ann Lehman, PhD, joined SAS Institute in 1979 and is retired and working as a JMP consultant doing applications programming and statistical documentation. She has been working with JMP since its inception in 1988. A co-author of JMP for Basic Univariate and Multivariate Statistics: Methods for Researchers and Social Scientists, Second Edition, and JMP Start Statistics, Ann has a diverse background that includes editing and writing SAS user’s guides, writing and teaching SAS courses, and serving as technical editor of the JMPer Cable, JMP’s technical newsletter.
Norm O’Rourke, Ph.D., R.Psych., is a clinical psychologist and associate professor with the Faculty of Arts & Social Sciences at Simon Fraser University in Vancouver, BC, Canada. His areas of research interest include mental illness and well-being, marriage in later life, and test construction and validation.
Larry Hatcher, Ph.D., is a professor of psychology at Saginaw Valley State University in Saginaw, Michigan, where he teaches classes in general psychology, industrial psychology, elementary statistics, advanced statistics, and computer applications in data analysis. The author of several books dealing with statistics and data analysis, Hatcher has taught at the college level since 1984 after earning his doctorate in industrial and organizational psychology from Bowling Green State University in1983.
Dr. Stepanski is currently the Chief Operating Officer of ACORN Research LLC, a company that conducts clinical research in oncology. In this role, he oversees operations for several service areas including a US-based oncology research network, a contract research organization, and a health outcomes unit. He has written over 90 publications on a variety of topics related to clinical research.
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