Picture of Chris Bilder
Christopher R. Bilder, Ph.D.
University of Nebraska-Lincoln
Department of Statistics
340 Hardin Hall North, East Campus  
Lincoln, NE 68583-0963
Phone: (402) 472-2903
Website: www.chrisbilder.com
E-mail:  and

Instead of testing each individual, observations are made on groups of individuals pooled together with group size s > 1. In medical-screening experiments involving infectious diseases, grouping might involve pooling blood samples from several individuals to test for seropositivity. In most applications, the group response is binary, classified as either positive or negative.

Images from a past presentation: