Sir Ronald Aylmer Fisher (17 February 1890 – 29 July 1962), was an author who published as R. A. Fisher, he was also a very accomplished English statistician and biologist. Fisher used mathematics to combine Mendelian genetics and natural selection, which ultimately helped to create the new Darwinist synthesis of evolution known as the modern evolutionary synthesis. He was also a prominent eugenicist in the early part of his life. Mr. Fisher worked at Rothamsted Research for 14 years beginning in 1919. It was here where he developed the analysis of variance (ANOVA) which is still used today in six sigma to analyse immense amounts of data. In Fisher's case it was used to analyse crop experiments. Later, Mr. Fisher established a reputation as a biostatistician.
In 1935 The Design of Experiments was published. The book was written by the English statistician Ronald Fisher about design of experiments and is considered a foundational work in experimental design. Among other contributions, the book introduced the concept of the null hypothesis in the context of the lady tasting tea experiment. Mr. Fisher died in July of 1962 after leaving a powerful legacy full of influence on the world of statistics and six sigma.
Reference: Wikipedia - Ronald Fisher
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