American Statistical Association
New York City
Metropolitan Area Chapter

New York State Psychiatric Institute
at Columbia University Medical Center
Biostatistics Seminar



Cheng-Shiun Leu, Ph.D.
The HIV Center for Clinical and Behavioral Studies
and Columbia University


Sequential procedure for selecting a subset of b best populations from among c candidate populations has wide-ranging applications. The populations could represent clinical treatments, behavioral interventions, disease associated genes, industrial processes, computer operating systems, and so forth. We introduce a family of sequential selection and recruitment procedures for the subset identification problems in binomial populations whereas the procedures can in fact apply to any univariate distribution in the exponential family. The operating characteristics for the proposed procedures such as the probability of correct selection, expected number of rounds, expected total number of samples, and the expected total number of failures are compared to other procedures in simulation studies.

Biographical Note

Dr. Cheng-Shiun Leu is a biostatistician at The HIV Center for Clinical and Behavioral Studies and Assistant Professor of Clinical Biostatistics at Columbia University. He has collaborated with Center investigators on study design and planning, consultation for ongoing projects, and conducting statistical analysis. His primary research interest concerns the development methodologies for sequential ranking and identification problems

Date: Tuesday, February 24, 2009
Time: 3:00 - 4:00 P.M.
Location: New York State Psychiatric Institute
1051 Riverside Drive
6th Floor Multipurpose Room (6602)
New York, New York


Coffee: 2:45 to 3:00 P.M.
Reception: 4:00 to 4:30 P.M.

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