William H. Friedman (scientist)

William H. Friedman was an American psychologist and statistician known for developing the Friedman test, a non-parametric method used to analyze differences across multiple related groups. His work helps researchers determine if there are significant differences without assuming normal data distribution. Friedman’s contributions have been influential in fields like psychology, medicine, and social sciences, where data often don’t meet standard statistical assumptions. His methods provide robust tools for analyzing experimental data, making it easier to draw meaningful conclusions about the effects of various treatments or conditions.