Galton board

Galton box
A Galton box demonstrated

The Galton board, also known as the Galton box or quincunx or bean machine (or incorrectly Dalton board), is a device invented by Francis Galton[1] to demonstrate the central limit theorem, in particular that with sufficient sample size the binomial distribution approximates a normal distribution.

Galton designed it to illustrate his idea of regression to the mean,[2] which he called "reversion to mediocrity" and made part of his eugenist ideology.[3]

  1. ^ Galton, Sir Francis (1894). Natural Inheritance. Macmillan. ISBN 978-1297895982
  2. ^ Kunert, Joachim; Montag, Astrid; Pöhlmann, Sigrid (2001-04-01). "The quincunx: history and mathematics". Statistical Papers. 42 (2): 143–169. doi:10.1007/s003620100048. ISSN 1613-9798.
  3. ^ Renwick, Chris (2011). "From political economy to sociology: Francis Galton and the social-scientific origins of eugenics". The British Journal for the History of Science. 44 (3): 343–369. ISSN 0007-0874.

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