Lorrie L. Hoffman
Armstrong Atlantic State University
Department of Mathematics
University Hall 297C
Phone: (912) 344-2557
Lorrie received her Ph.D. from the University of Iowa in 1981.
A perpetual student of college and life, Lorrie has put in time at many
institutions of higher education
and has seen alot of the world (mostly FIRST CLASS, having worked
for the airlines) and has sampled a varied menu of
employment options. She likes to get the word out
about new discoveries via publications
in the area of statistical theory and applications. Check out
the next conference she is speaking
at. Lorrie puts lots of novel course
notes and stuff on the web. Check out some of the people you can meet .
Educated in the hotbed of statistical excellence - the Midwest at Moraine
Valley Community College; Chicago State University; Western Illinois
University; University of Illinois and University of Iowa
As for the school of hard-knocks (also known as the real world), gainful
employment occured at such prestigious places as Illinois State
Water Survey (counting raindrops); University of Illinois Research
Resources Center (analyzing comfort levels of various positions for
birthing mothers); TransWorld Airlines (keeping those hard drives spinning
for the travel agents); United Airlines (efficiently getting those food
trucks to your planes); AT&T (learning the difference between EPROM
and RAM), at the illustrious (can't beat the weather) institution called
University of Central Florida and now at Armstrong Atlantic State University
in historic Savannah, Georgia.
- HOFFMAN, L., KNOFCZYNSKI, G., and CLARK, S., "Estimation of Parameters
in the Joinpoint Two-Regime Regression Model,"
COMMUNICATIONS IN STATISTICS-SIMULATION AND COMPUTATION , Vol.
39, No. 8, pp, 1562-1576, 2010.
- HOFFMAN, L.L., HUTCHINSON, C., and REISS, E., “On Improving School
Climate: Reducing Reliance On Rewards And Punishment,” International Journal
Of Whole Schooling,
,Vol. 5, No. 3, 12 pages, 2009.
- KNOFCZYNSKI, G., HADAVAS, P., AND HOFFMAN, L., "Effects of Implementing
Projects in an Elementary Statistics Class," Journal of Mathematical Sciences
and Mathematics Education , Vol. 2, No. 2, 2007. Online: http://www.msme.us/
- BUDDEN, M., HADAVAS,
P., HOFFMAN, L. and PRETZ, C., "
Generating valid 4x4 correlation matrices,"
Applied Mathematics E-Notes, 7(2007), 53-59 , http://www.math.nthu.edu.tw/~amen/
- HOFFMAN, L., HUTCHINSON, C., and REISS, E., “Training Teachers
in Classroom Management: Evidence of Positive Effects on the Behavior
of Difficult Children” SRATE (Southeastern Regional Association of Teacher
Educators) journal, Vol. 14, No. 1, Winter 2005, pp.36-42.
- HOFFMAN, L.L.,"Obtaining Confidence Intervals For Cpk Using Percentiles
of the Distribution of Cp" Quality and Reliability Engineering
International , Vol. 17, pp. 113 - 118, 2001. Online: http://onlinelibrary.wiley.com/doi/10.1002/qre.389/abstract
- HOFFMAN, L.L. and GUO, L., "Financial Analysis on Retirement Implications
for Women," Society of Actuaries Library Monographs , 2002,
paper available at
- HOFFMAN, L.L., GILLETTE, D., LINDBECK, A.G., MORTON, W., "Deconstructing
the Walls between Sciences and Humanities,"; Online:
- BORDE, S.F.; WHYTE, A.M.; WIANT, K.J.; HOFFMAN, L.L., "New Evidence
on Factors That Influence The Wealth Effects of International Joint
Ventures," Journal of Multinational Financial Management
- HOFFMAN, L.L.,"Revisiting the Definition of Process Control in
Autocorrelated Data", Proceedings of the American Statistical
Association , 1997.
- HOFFMAN, L.L., " The Concept of Fair Fight on Mismatched Simulator
Environments, "Proceedings of the Southeastern Simulation Conference
, pp. 234-236, 1995.
- HOFFMAN, L.L., Book Review of Markov Models of Optimization by
M.H.A. Davis, Technometrics , Vol. 37, No. 2, pp. 236, 1995.
- HOFFMAN, K.S., HOFFMAN, L.L., " The Effects of Adding Sacral Base
Leveling to Osteopathic Manipulative Treatment of Back Pain: A Pilot
Study, " Journal of the American Osteopathic Association, Vol.
94, No. 3, pp. 217-226, 1994.
- HOFFMAN, L.L., " A General Approach for Testing the Process Capability
Index, "Quality and Reliability Engineering International,
Vol. 9, No. 5, pp. 445-449, 1993.
- HOFFMAN, L.L., " An Improved Approach to the Performance Evaluation
of Distributed Mutual Exclusion Algorithms for Computer Networks,
" Computer Systems Science and Engineering, Vol.8, No.
2, pp. 67-71, 1993.
- HOFFMAN, L.L., " Characterizing Linear Birth and Death Processes,
" Journal of the American Statistical Association, Vol.87,
No. 420, pp. 1183-1187, 1992.
- HOFFMAN, L.L.," Choosing the Best Set of Quality Judges: A New
Quality Tool, "Quality and Reliability Engineering International,
Vol.7, No.6, pp. 475-478, 1991.
- HOFFMAN, L.L., " Looking at AT&T's New 3B2 Computer, " AT&T
Technology, Vol. 3, No. 2, pp. 44-51, 1988.
- HOFFMAN, L.L., " Workload Forecasting Using Econometric Time Series,"
Proceedings of the Computer Measurement Group, 1982.
- HOFFMAN, L.L.," TESTGEN - A Tool for Emancipation from Traditional
Instruction," Proceedings of the Association for Computing Machinery,
Program to calculate critical values for testing Cp greater
than cp(low) for small samples with n odd. Download and execute in
the command-prompt, MSDOS window.
Program to create upto valid 5x5 correlation matrices. Download it and
also the fortran libraries into
the same folder and click on the executable validcor5 to execute in
the command-prompt, MSDOS window.
Website with oodles
of statistical programs
* Travel grant funding
by the Association for Women in Mathematics and NSF to chair an invited
session in Statistical Education and to present a paper at JSM 2009 in Washington,
* Private consulting with a local Savannah
attorney to appear as an expert witness in a discrimination case -- ended
"A Non-Least-Squares Method For Estimation of Broken-line
Regression to Determine Plateau Time of Outputs In Some Animal Science Studies,"
on joint work with Knofcyznski, G., and
Clark, S., presented at the Hudson Colloquium on April 20, 2011.
“Modeling Animal Mother-Infant Distance Proximity over Time to Determine
a Change Point in Behavior” on joint work with Knofcyznski, G., Clark,
S., Hudson, J., King, H., and Rogers, A., at the MAA Southeast Sectional
Meetings, Nashville, TN, March, 2009 and at the Joint Statistical Meetings,
Washington, DC, August, 2009.
In DC in August, 2009
'Fostering the Rare Event (the Student-Scientist),' presented
at the Anne and Sigmund Hudson Mathematics and Computing Colloquium
on August 29, 2007. See:
"Exploring Applications of Missing Data Algorithms,"
presented at the Anne and Sigmund Hudson Mathematics and Computer
Science Colloquium on
September 6, 2006, and at Georgia Southern
University's Mathematics on September 29, 2006.
On October 27, 2006, presenting work on factor analysis
to determine success attributes leading to retention of K-12 teachers
, Georgia Educational Research Association.
"Some Cautions on Applying the EM Algorithm to a Quality Assessment Application,"
at the 2006 Joint Research Conference on Statistics in Quality,
and Technology, Knoxville, TN, June 7, 2006.
"Teaching A Large Enrollment Section of Math2200: Elementary Statistics,"
at the AASU Faculty Development Symposium, April 1, 2005.
"Being One's Own Experimental Unit in the Classroom," contributed session
at the AMS/MAA national annual conference in Atlanta, January 6,
2005. Find the
Quoted in USA Today Newspaper. See
'about Ronald Regan'
"Math Modeling and its Role in Computer Performance Analysis," invited
talk at the Ann and Sigmund Hudson Mathematics/Computer Science
Colloquium, August, 2004.
"Comparative Rankings: Ascertaining Pre- and Post-Test Differences in
a Survey Instrument," by E. Reiss on joint work at the Florida
Chapter Meeting of the American Statistical Association, Orlando,
FL, Feburary, 2004.
"Recruitment and Restoration of the Oyster Crassostrea virginica on Intertidal
Reefs in Areas with Intense Boating Activity," by L. Wall on joint
work (also with Walters, L. and Sacks, P.) at Society for Integrative
and Comparative Biology Association Annual Meeting, New Orleans,
LA, January, 2004.
Spoke at the Florida Judges' Conference in Orlando in September, 2003
The Everglades in May, 2004.
The Charleston tea factory in 2010
Current Course Materials
Experimental Design course
Math2200 Elementary Statistics
Friends and Family
......Sailing the San Francisco Bay in 2002
at mallory pier in May, 2004
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Cruising the Bahamas 2009
At the 2012 High School Bowl at Armstrong on February 18, 2012
Presenting Awards at the Spring 2011 Math BBQ
Student Team at the MAA Math Jeopardy Competition in Nashville
in March, 2009
AASU Day October 12, 2005
AASU DAY October 6, 2005
at the 2007 Spring Banquet
Christmas time at my house with faculty
2004 Middle School Bowl
Our 2005 Alumna Davelyn Vinson's speech
Math Department 2005 Spring Banquet
Math Department 2006 High School Math Competition
Just click Here
to say "BYE BYE"