Egon Pearson

Egon Sharpe Pearson (1895-1980) was a British mathematician and statistician who became one of the most influential figures in twentieth-century statistical theory. Born in Hampstead, London, he succeeded his father Karl Pearson as professor of statistics at University College London and as editor of Biometrika. He is best known for developing the Neyman-Pearson lemma with Jerzy Neyman, a foundational framework for statistical hypothesis testing that remains central to frequentist inference, and for advancing the understanding of Type I and Type II errors in statistical testing. He also applied statistical methods to practical domains including industrial quality control and weapons testing. He served as President of the Royal Statistical Society from 1955 to 1956, was elected Fellow of the Royal Society in 1966, and received the Guy Medal in gold in 1955.