The Exponential Distribution
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The waiting time to observe the occurrence of an event in a Poisson process with intensity is a random variable that follows the exponential distribution with parameter (which must be positive). The exponential distribution is a special case of the gamma distribution with parameters and . The red vertical segment marks the mean of the distribution.
Contributed by: Chris Boucher (March 2011)
Open content licensed under CC BY-NC-SA
"The Exponential Distribution"
Wolfram Demonstrations Project
Published: March 7 2011