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Our Faculty

The team of faculty for the online Master of Science in Applied Statistics is led by Thomas Ilvento, Professor and Program Director of MS in Applied Statistics. 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 and Director of MS in Applied Statistics
Department of Applied Economics and Statistics
Office: 302-831-6773

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

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.

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

Course Developer
Online M.S. in Applied Statistics

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.

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Chunbo Fan, Ph.D.

Assistant Professor and Course Developer
Online M.S. Applied Statistics

Chunbo Fan’s focus is on promoting students’ academic success which extends to their professional achievements. She emphasizes on combining real-world practices to theoretical training in statistics, and encourage students to apply critical thinking in their daily situations.

Before joining UD, Fan was an Associate Director at Bayer Pharmaceutical, and a manager of Quantitative Commercial Insight at Astrazeneca Pharmaceutical. She has more than 11 years of experience in the industry, specializing in commercial analytics, marketing mix modeling, and commercial experiment and pilot programs.

Chunbo earned her Ph.D. and her M.S. from the University of Delaware, and she holds a B.S. from the Central University of Finance and Economics (China).

Photo of Geoffrey Scott

Geoffrey C. Scott, Ph.D.

Course Developer
Online M.S. Applied Statistics

Geoffrey Scott’s professional focus is on analytics to support academic and corporate practices. He has more than 11 years of experience with market research practice and supporting analytics in the pharmaceutical industry and 16 years of experience in applied math and statistics in the telecommunications industry.

Geoff’s teaching and research experiences includes appointments at Northeastern University, Temple University, and Rider University. He is experienced in curriculum development and knowledge delivery in both on-line and on-ground courses. He specializes in teaching predictive analytics, data warehousing, database designs and analytical processes in health information management, optimization methods, operations research, management information systems, and production and operations. His research interests include predictive analytics, big data, data visualization, machine learning, optimization algorithm development, influence networks and adoption modeling, mix modeling and stratified test-control.

In the corporate domain, Geoff has worked at AstraZeneca as a Senior Manager in Marketing Science and AT&T Bell Labs as a Member of Technical Staff and liaison to the Bell Labs Mathematical Research Center. His global experience includes multiple engagements in United States, Canada, France, Germany, Spain, Mexico, The People’s Republic of China, and The Republic of China.

Geoff earned a Ph.D. and M.S. at the University of Pennsylvania, Moore School of Electrical Engineering. He also earned a B.S. at Brown University, Physical/Quantum Chemistry. He is the author of more than forty technical publications and presentations in the public and corporate domain.

Photo of Hemei Liu

Hemei Liu, M.S.

Course Developer
Online M.S. Applied Statistics

Hemei Liu is a Supervisory Specialist in the Federal Reserve Bank of Philadelphia, and a Course Developer for the Online M.S. in Applied Statistics Degree Program. Prior to joining the Federal Reserve Bank, she was a quantitative operation manager at the Bank of American.

She has nineteen year of banking experience with proven modeling skills, in-depth knowledge on portfolio profit growth through credit line optimization, subject-expert on data quality monitor, model performance tracking, and experimental design.

Her modeling skills include binary logistic regression, multinomial logit analysis, logit analysis for longitudinal data, discrete time survival analysis, multivariate linear regression, time series model, valuation-framework profit model, optimization, machine learning, cluster analysis, multi-level experimental design, model performance evaluation, variable screening, model validation, data quality monitoring, and model examination.

Her honor and achievements include a US patent for the novel methodology of monitoring model score migration, generating incremental $60mm profit per year from her credit line increase model, generating $6.6mm expense saving per year from her collection model, and generating $22mm capital saving per year from her reward point breakage model.

Hemei holds a M.S. in Statistic from the University of Delaware, a M.A. in Energy and Environmental Policy from the University of Delaware, and a B.S. in Mathematical Statistics from the NanKai University.

Joseph Scocas, M.S.

Course Developer
Online M.S. Applied Statistics

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.

Photo of Yihuan Xu

Yihuan Xu, Ph.D.

Course Developer
Online M.S. in Applied Statistics

Yihuan Xu is an associate director in the biometrics department at BeiGene Ltd where she works as a biostatistician to support clinical development of multiple oncology drugs. Prior to joining BeiGene, Xu worked as a biostatistician at Eli Lilly and Company in New Jersey for 10 years, supporting the Cyramza program on multiple phase II/III clinical trials. Before that, Xu was a biostatistician in Thomas Jefferson University Cancer center where she provided statistical support on cancer research across cancer biology to clinical studies.

Xu earned her medical degree from Peking University Health Science Center. She also received her Ph.D. in Statistics from Temple University and her M.S. degrees in Molecular Biology and Statistics from University of Delaware.

Her research interest is in survival analysis in oncology clinical trials, especially in biomarker enrichment study design and non-proportional hazard survival analysis.

Photo of Mark Keese

Mark Keese, Ph.D.

Course Developer
Online M.S. in Applied Statistics

Mark Keese originally trained as a biologist, receiving his bachelor’s and master’s degrees from the University of Delaware. He then received a Ph.D. in Ecology and Evolutionary Biology from Stony Brook University. After a brief stint on the faculty in the Biology Department at the University of Delaware, he joined Dupont Pharmaceuticals working as a statistical programmer analyzing pharmaceutical clinical trials. That began a diverse and varied career spanning over 20 years in the pharmaceutical industry (mostly at AstraZeneca Pharmaceuticals) across both clinical trials and business insight/analytics. Keese has held a diversity of roles as a statistical programmer, biostatistician, market researcher, sales forecaster, and director of an advanced analytics group that employed a variety of regression, multivariate, and time series statistical techniques to inform business critical decisions. Along the way he picked up a master’s in applied statistics from Villanova University, attending evening classes while working full-time. In his spare time, he is a dedicated track and field athlete and coaches the University of Delaware club cross-country and track team.

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