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Poisson distribution definition

Pois·son· distribution (pwä sōn′, -sōn′)

Statistics a frequency distribution that may be regarded as an approximation of the binomial distribution when the number of events becomes large and the probability of success becomes small

Etymology: after S. D. Poisson (1781-1840), Fr mathematician

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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