Poisson distribution

Poisson distribution

[pwah-sohn; French pwa-sawn]
noun Statistics.
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:
1920–25; named after S. D. Poisson (1781–1840), French mathematician and physicist

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World English Dictionary
Poisson distribution (ˈpwɑːsən)
 
n
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)
 
[C19: named after S. D. Poisson]

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Science Dictionary
Poisson distribution   (pwä-sôɴ')  Pronunciation Key 
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
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FOLDOC
Computing Dictionary

Poisson distribution definition

mathematics
A probability distribution used to describe the occurrence of unlikely events in a large number of independent trials.
Poisson distributions are often used in building simulated user loads.
[Formula?]
(2003-03-18)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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