Statistics is a branch of mathematics dealing with the collection, analysis, interpretation, and presentation of masses of numerical data.
Two main statistical methods are used in data analysis: 1) Descriptive Statistics - which summarize data from a sample using indexes, such as the mean or standard deviation, and 2) Inferential Statistics - which draw conclusions from data that are subject to random variation such as observational errors or sampling variation.
Sir Ronald Aylmer Fisher was a British statistician and geneticist. For his work in statistics, he has been described as "a genius who almost single-handedly created the foundations for modern statistical science" and "the single most important figure in 20th century statistics".
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