Term: Poisson Distribution

Glossary Definition

Last Updated: 2013-10-04

Definition:

The pattern usually followed by a set of results in which the measurements are counts. It is a special case of the binomial distribution (see Negative Binomial Distribution ) in which the number of individuals is very large and the chance of one of the two possible outcomes occurring is very small (Hassard T, 1991). This distribution is based on the assumption that the variance of an outcome is equal to its mean.

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