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Poisson distribution

[pwah-sohn; French pwa-sawn] /pwɑˈsoʊn; French pwaˈsɔ̃/
noun, Statistics.
1.
a limiting form of the binomial probability distribution for small values of the probability of success and for large numbers of trials: particularly useful in industrial quality-control work and in radiation and bacteriological problems.
Origin
1920-1925
1920-25; named after S. D. Poisson (1781-1840), French mathematician and physicist
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for poisson-distribution

Poisson distribution

/ˈpwɑːsən/
noun
1.
(statistics) a distribution that represents the number of events occurring randomly in a fixed time at an average rate λ; symbol P0(λ). For large n and small p with np = λ it approximates to the binomial distribution Bi(n,p)
Word Origin
C19: named after S. D. Poisson
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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poisson-distribution in Science
Poisson distribution
  (pwä-sôɴ')   
A probability distribution which arises when counting the number of occurrences of a rare event in a long series of trials. It is named after its discoverer, French mathematician and physicist Siméon Denis Poisson (1781-1840).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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