Who first named the statistical concept of "variance"?

Variance is a statistical measurement of the spread of numbers in a data set. It measures how far each number in the set is from the mean (average), and thus from every other number in the set. It is applied in many areas of science and social science. For example, in finance variance is used by both analysts and traders to characterise volatility and market stability.

Sir Ronald Aylmer Fisher FRS (17 February 1890 – 29 July 1962) was a British polymath who was active as a mathematician, statistician, biologist, geneticist, and academic. 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" In genetics, Fisher was the one to most comprehensively combine the ideas of Gregor Mendel and Charles Darwin, as his work used mathematics to combine Mendelian genetics and natural selection;

During 1913–1919, Fisher worked as a statistician in the City of London and taught physics and maths at a sequence of public schools, at the Thames Nautical Training College, and at Bradfield College. In 1918 he published "The Correlation Between Relatives on the Supposition of Mendelian Inheritance", in which he introduced the term “variance” and proposed its formal analysis.