**Thomas W. O'Gorman**

**Associate Professor**

** Division of Statistics**

**Northern Illinois University**

Updated February 2, 2012

**EDUCATION**

1988 - Ph.D.University of Iowa (Biostatistics: Department of Preventive Medicine and Environmental Health)

1980 - M.S.Southern Illinois University at Edwardsville (Department of Mathematics, Statistics, and Computer Science)

1968 - B.S. St. Louis University (Mathematics)

**BOOKS
**

O’Gorman, T.
W.: *Adaptive Tests of Significance Using Permutations of Residuals with R and SAS, * John Wiley & Sons, New York, 2012.

O’Gorman, T.
W.: *Applied Adaptive Statistical Methods: Tests of Significance and
Confidence
Intervals, *Society for Industrial and Applied Mathematics, Philadelphia,
2004.

**RECENT STATISTICAL
ARTICLES**

O’Gorman, T.
W.: An Adaptive Test for the Analysis of Repeated Measurements Having Missing
Data. *Statistics in Biopharmaceutical Research*, 2, 109-121, 2010.

O’Gorman, T.
W.: A Comparison of Several Adaptive Tests for Paired Data,
*Journal of Statistical Computation and Simulation*, 79, 1083-1093, 2009.

O’Gorman, T.
W.: An Adaptive Method of Variable Selection in Regression,
*Communications in Statistics-Simulation and Computation* 37,
1129-1142, 2008.

O’Gorman, T.
W.: Using Adaptive Tests for the Analysis of Repeated Measurements,
*Journal of Biopharmaceutical Statistics* 18, 595-610, 2008.

O’Gorman, T.
W.: An Adaptive Test of a Subset of Regression Coefficients Using
Permutations of Residuals, *Journal of Statistical Computation
and Simulation*, 76, 1095-1105, 2006.

O’Gorman, T.
W.: An Adaptive Test for a Subset of Coefficients in a Multivariate Regression
Model, *Biometrical Journal*, 48, 849-859, 2006.

O’Gorman, T.
W.: The Performance of Randomization Tests that use Permutations
of Independent Variables, *Communication in
Statistics--Simulation and Computation*, 34, 895-908, 2005.

O’Gorman, T.
W.: Using Adaptive Methods to Select Variables in Case-Control Studies.
*Biometrical Journal*, 46, 595-605, 2004.

O’Gorman, T.
W.: An adaptive test of significance for a subset of regression coefficients.
*Statistics in Medicine*, 21, 3527-3542, 2002.

O’Gorman, T.
W.: Using adaptive weighted least squares to reduce the lengths of confidence
intervals. *The Canadian Journal of Statistics*, 29, 459-471, 2001.

O’Gorman, T.
W.: A comparison of the F-test, Friedman’s test, and several aligned rank tests
for the analysis of randomized complete blocks. *Journal of Agricultural,
Biological,
and Environmental Statistics*, 6, 367-378, 2001.

O’Gorman, T.
W.: Adaptive estimation using weighted least squares. *Australian & New
Zealand Journal of Statistics*, 43, 287-298, 2001.

O’Gorman, T.
W.: An adaptive permutation test procedure for several common tests of
significance.*Computational Statistics and Data Analysis*, 35, 335-350,
2001.

O'Gorman, T.
W.: A comparison of an adaptive two-sample test to the t-test and the rank-sum
test. *Communications in Statistics--Simulation and Computation*, vol. 26,
pp.1393-1411, 1997

O'Gorman, T.
W.:An adaptive test for the one-way layout. *The Canadian Journal of
Statistics*, vol. 25, pp. 269-279, 1997.

O'Gorman, T.
W.: An adaptive two-sample test based on modified Wilcoxon scores. *Communicat
ions
in Statistics--Simulation and Computation,* vol. 25, pp. 459-479, 1996.

O'Gorman, T. W.
and Woolson, R. F.: Using Kendall's t_{b}
correlations to improve variable selection methods in case-control studies.*Bi
ometrics*,
vol. 51, pp. 1451-1460, 1995.

O'Gorman, T. W.
: The effect of unequal variances on the power of several two-sample tests. *C
ommunications
in Statistics--Simulation and Computation*, vol. 24, pp. 853-867, 1995.

O'Gorman, T.
W.: Using sign score regression models to select variables in case-control
studies.*Statistics in Medicine*, vol. 14, pp. 431-443, 1995.

O'Gorman, T.
W., Woolson, R. F., and Jones, M. P.: A comparison of two methods of estimating
a common risk difference in a stratified analysis of a multicenter clinical
trial.*Controlled Clinical Trials*, vol. 15, pp. 135-153, 1994.

O'Gorman, T. W.
and Woolson, R. F.: The effect of category choice on the odds ratio and several
measures of association in case-control studies. *Communications in
Statistics--Theory and Methods*, vol. 22, pp. 1157-1171, 1993.

O'Gorman, T. W.
and Woolson, R. F.: On the efficacy of the rank transformation in stepwise
logistic and discriminant analysis. *Statistics in Medicine*, vol. 12, pp.
143-151, 1993.

Woolson, R. F.
and O'Gorman, T. W. : A comparison of several tests for censored paired data. *Statistics
in Medicine*, vol. 11, pp. 193-208, 1992.

O'Gorman, T. W.
and Woolson, R.F.: Variable selection to discriminate between two groups:
stepwise logistic regression or stepwise discriminant analysis?*The American
Statistician*. vol. 45, pp. 187-193, 1991.

O'Gorman, T. W.
and Woolson, R.F.: The stability of several measures of association in small
contingency tables. *Communications in Statistics: Theory and Methods*.
vol. 19, pp. 1141-1155, 1990.