College of Agriculture & Natural Resources

Our Faculty

The team of faculty for the online Master of Science in Applied Statistics is led by Thomas Ilvento, Professor and Chair of the Applied Economics and Statistics department (APEC). Professional statisticians working at leading organizations developed courses specifically for the University of Delaware’s online master’s degree program in applied statistics, which also includes courses developed by the distinguished full-time faculty members who teach our on-campus students. All of the courses for the online program are managed by master’s degree level statisticians who are APEC faculty members.


Photo of Thomas Ilvento

Thomas Ilvento, Ph.D.

Professor, Chair and StatLab Coordinator
Department of Applied Economics and Statistics
Office: 302-831-6773
ilvento@udel.edu

Courses:
STAT 666 Independent Studies
Introduction to JMP

Thomas Ilvento specializes in collaborative needs assessment projects, in which he involves industry professionals in the design and implementation of surveys, focus groups, and other methods. His experience also includes public policy, business retention, community needs assessment, and collaborative problem solving.

Ilvento is trained in research methodology, applied statistics, demography, facilitation, mediation, and collaborative problem solving. He teaches graduate and undergraduate courses in applied statistics and has taught online class for more than 15 years. He also runs the StatLab, a statistical consulting opportunity for students, faculty, and outside companies and organizations.

Ilvento has co-authored numerous published studies and is the author of the text, 2013 Statistics, Plain and Simple. He earned his Ph.D. in rural sociology and his B.S. degree in Community Development, both from Pennsylvania State University. He holds an M.S. in Resource Economics/Community Development from the University of New Hampshire. Prior to joining the University of Delaware, he was an Associate Professor at the University of Kentucky.


Photo of Patrick DeFeo

Patrick DeFeo, Ph.D.

Adjunct Instructor
Department of Applied Economics
Course Developer
Online M.S. in Applied Statistics

Course: STAT 611 Regression Analysis

Patrick DeFeo is an Adjunct Instructor for the Department of Applied Economics and Statistics and a Course Developer for the department’s Online M.S. in Applied Statistics degree program.

As the Principal Consultant Statistician for the DuPont Company, DeFeo has provided statistical leadership working with multidisciplinary teams in product development and process improvement. He has lead project teams, designed studies, and used advanced statistical analyses to provide practical guidance for complex business projects.

During his 29 years at DuPont, DeFeo has taught training in design of experiments, data analysis, and statistical process control. He has also taught Six Sigma training for Black Belts and Master Black Belts at the organization and is a DuPont certified Master Black Belt.

DeFeo holds a Ph.D. and M.S. in Statistics, both from Virginia Tech, and a B.S. in Mathematics from Montclair State College.


Photo of Steven P. Bailey

Steven P. Bailey, Ph.D., CSSBB, CMBB

Course Developer
Online M.S. in Applied Statistics

Course: STAT 615 Design and Analysis of Experiments I

Steven Bailey worked in DuPont’s Applied Statistics Group for more than 36 years, retiring from the organization in 2016 as its Principal Consultant and Master Black Belt. During his first two decades at DuPont, Bailey applied Statistical Process Control (SPC), Design of Experiments (DOE), and other data-based improvement methods in a Product Quality Management (PQM) framework for multiple DuPont businesses. From 1999 until his retirement, Bailey drove the deployment of Six Sigma in DuPont through co-developing and coordinating their corporate leveraged Black Belt, Master Black Belt (MBB), and Champion training, as well as leading their corporate MBB Network.

He has been an active member of the American Society for Quality (ASQ) for more than 30 years, serving as the Society’s President in 1997-98 and its Chairman of the Board in 1998-99. Bailey is a certified Black Belt and a certified Master Black Belt, by both DuPont and ASQ.

He holds a Ph.D. and M.S. in Statistics and a B.S. in Computer Science and Statistics, all from the University of Wisconsin.


Melissa Ziegler, Ph.D.

Course Developer
Online M.S. in Applied Statistics

Course: Stat 674 Applied Data Base Management

Melissa Ziegler is a Senior Biostatistician at the University of Delaware College of Health Sciences, where she collaborates with investigators in clinical research activities including statistical design and analysis and selection of appropriate statistical methodology. Prior to joining the UD College of Health Sciences, Melissa worked as instructor in the UD Department of Statistics, lecturing the Logistic Regression course, co-lecturing the Biostatistics course, and developing all content for both courses.

Ziegler was a Consulting Statistician at DuPont for 10 years, serving as the Lead Consultant with Crop Protection Research and Development and as At-Large Consultant with multiple business units. She also worked as an instructor at DuPont, teaching Six Sigma Black Belt and Green Belt courses and courses on experimental design and product commercialization.

Ziegler holds a Ph.D. and M.A. in Statistics, both from the University of Pittsburgh, and a B.S. in Mathematics from Elizabethtown College.


Mia Papas, Ph.D.

Course Developer
Online M.S. in Applied Statistics

Course: Stat 656 Biostatistics

Mia Papas is the Director of Clinical Research and Health Outcomes for The Christiana Care Health System and Value Institute, where her responsibilities include providing mentorship to Value Institute investigators and scholars, and service line consultation.

Her expertise includes experimental and observational study designs, big-data analytic methods, the assessment of validity and reliability of screening tools, sample size and statistical power, the analysis of longitudinal data, hierarchical linear modeling, the use of geographic information systems in understanding the effect of place on health and health behaviors, factor analysis, survival analysis, and multivariate logistic and linear regression.

Papas engages in research on the role of maternal dietary factors in influencing child obesity, premature mortality among people with severe mental illness, and health disparities for people with physical and emotional disabilities.

She has authored more than 40 peer-reviewed articles and has taught at both the University of Delaware and Drexel University. Papas holds a Ph.D. in Epidemiology from the Johns Hopkins University, an M.S. in Epidemiology and Biostatistics from the University of Massachusetts at Amherst, and a B.S. in Mathematics from Fairfield University.


Joseph Scocas, M.S.

Course Developer
Online M.S. Applied Statistics

Course: Stat 616 Advanced Design of Experiments

Joseph Scocas is an Adjunct Instructor for the Department of Applied Economics and a Course Developer for the Online M.S. in Applied Statistics degree program.

He has worked at DuPont since 2007 and, in his current role as Statistician/Research Investigator with the Crop Protection division, his responsibilities include statistical simulations; analysis, using generalized linear mixed models; project management; support of discovery; and development and product support. He also has developed Design of Experiments (DoE) training, supervised master-level contractors and mentored graduate-level interns. Scocas previously served as a Statistician/Consulting Statistician at DuPont, working with multiple divisions as a member of DuET’s Applied Statistics Group.

Prior to joining DuPont, Scocas served as a Financial Officer, Mortgage Officer, and Management Analyst for the Delaware State Housing Authority, where he provided financial reports to investors, performed financial and regulatory compliance on loan applications, and provided internal and external statistical support.

He is Six Sigma Green Belt certified and Black Belt trained. Scocas is also an expert in the use of SAS programming including SQL coding, SAS macro language, statistical procedures, and advanced graph programming.

Scocas holds a M.S. in Statistics and a B.B.A. in Operations Management and Supervision, both from the University of Delaware.

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