Karl Pearson and Testing Statistical Hypotheses

Stephen M. Stigler
Ernest Dewitt Burton Distinguished Service Professor of Statistics
Department of Statistics
University of Chicago


        Karl Pearson was born 150 years ago this year.  I will present an appreciation of Pearson that acknowledges some major errors that led to major advances, even forming a background for the modern theory of hypothesis testing. Some of this work is discussed, with the aim of identifying some threads in common with the work of Erich Lehmann, who reaches his 90th birthday this year.