= Edwin Bidwell Wilson
{c}
{title2=1879–1964}
{wiki}
= Edwin B. Wilson
{c}
{synonym}
<Edwin Bidwell Wilson> was a <mathematician> and <statistician>, remembered in statistics for the <Wilson score interval>. His 1931 paper with <Margaret M. Hilferty> introduced an influential approximation to the <chi-squared distribution>. His firsthand National Academy of Sciences memoir lists the paper under his full name.https://www.nasonline.org/wp-content/uploads/2024/06/wilson-edwin-b.pdf[Hunsaker and Mac Lane, memoir title and bibliography p313, The distribution of chi-square]{ref}
Their <Wilson-Hilferty transformation> uses $(X/k)^{1/3}$ for a <chi-squared distribution> with $k$ <statistical degrees of freedom>. Its approximate mean $1-2/(9k)$ and <variance> $2/(9k)$ give a <normal approximation> useful for converting quantiles between the two distributions.<The Distribution of Chi-Square by Edwin B. Wilson and Margaret M. Hilferty>[Cube-root approximation, pp684–688]{ref}
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