Keith E. Muller is an associate professor of biostatistics at the University of North Carolina in Chapel Hill. He earned B.S. and M.A. degrees in psychology from Bradley University. He subsequently ...

The statistical software R is well known for its very flexible graphical capabilities that are user-friendly if one understands the R programming language. One of the greatest aspects of R is the ...

BIOSKETCH: Leland Wilkinson is an adjunct professor of statistics at Northwestern University and senior vice president of SPSS, Inc. His research interests include statistical graphics and statistical ...