---
tag: 0XB9GQTN9G
kind: concept
name: Poisson distribution
msc: ["60E05"]
sources:
  - url: https://en.wikipedia.org/wiki/Poisson_distribution
    locator: lead section
same_as:
  wikidata: Q205692
  wikipedia: Poisson distribution
---

## Summary

The Poisson distribution with parameter $\lambda$ describes the number of events in a fixed interval of time or space.
It applies when the events occur independently at a constant mean rate.
The node [[Poisson distribution|0VEFSSKX18]] gives the precise definition.