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Seminar: Lynne Stokes

Statistics Seminar
March 2, 2001
All Day
1039 Derby Hall

Title

Estimating the number of classes using auxiliary information

Speaker

Lynne Stokes, Department of Management Science and Information Systems, University of Texas

Abstract

I discuss methods of estimating the number of classes (species) in a finite population using a sample of units from the population. Previous estimators using sample information alone have not performed well, so here I discuss a method of making use of auxiliary information about the observed classes to improve estimation. The estimator is similar to Alho's estimator of population size from capture-recapture data. It generalizes estimators of number of classes in an equal-class-size population by developing a regression model linking the size of observed classes and class characteristics. I discuss uses of the method for improving the performance of database software and for measuring disclosure risk.