Leonard A. Stefanski

Professor
Department of Statistics,
North Carolina State University,
Raleigh, NC, 27695-8203.

len_stefanski@ncsu.edu
Tel: (919) 515-1945
Fax: (919) 515-1169

Education:

Ph.D. Statistics, 1984, University of North Carolina, Chapel Hill, NC.
M.S. Statistics, 1983, University of North Carolina, Chapel Hill, NC.
B.S. Mathematics, 1979, University of Connecticut, Storrs, CT.
H.S.D., 1971, Waterford High School, Waterford, CT.
J.H.S.D., 1967, Clark Lane Junior High School, Waterford, CT.

Current Research Interests:

Variable selection.
Measurement error models.
Generalized linear models.
Environmental statistics.
Trout distributions.

Residual Plots as described in The American Statistician

Believe it or Not! You are looking at plots of residuals versus predicted values from the fit of multiple linear regression models to two different data sets.

Curious? Then click on an image and see how it's done (alas, these are not naturally occurring 1-in-a-trillion-trillion-trillion chance random scatter plots).

Homer Simpson. Mathematics is no stranger to the Simpsons, see simpsonsmath.com, but this may be the first time that Homer has dabbled in statistics. It appears that he has embedded himself into an infinite do loop! The image above is a spoof of a scene from a Simpson's episode in which Homer tackles a difficult mathematical derivation. Click on the image to learn how it was constructed.

Ronald Aylmer Fisher (1890-1962). This is an embedded-image version of a well-known image of Fisher operating a calculating machine. You can find the original at several places on the web, see here for example. Click on the image to learn how it was constructed.

Measurement Error Book 2nd Edition

The shadow images you see around this text are large trout in about six feet of water.

ST552 Syllabus and Old Final Exams

R Programs for Visualizing the NRC Rankings Data NRC Rankings Data.

The material on this web page is based upon work supported by the National Science Foundation under Grant No. 0504283. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author and do not necessarily reflect the views of the National Science Foundation.

	Legal Notice: The Simpsons, TM and and copyright, Fox and its related companies. All rights reserved. Any reproduction, duplication, or distribution in any form is expressly prohibited.
	Disclaimer: This web site, its operators, and any content contained on this site relating to The Simpsons are not authorized by Fox.