Poisson distribution
From ACT Wiki
Statistics.
A probability model used where discrete events occur in a continuum.
For example, the number of business interruptions occurring in a given time period.
The Poisson distribution can be a useful model for processes where:
- Continuous observation is needed, rather than a number of independent trials.
- The random variable takes a positive whole number (integer) value, with no upper limit.
- The expected number of occurrences is known or can be estimated, and
- Primary interest is in the number of times an event occurs within a particular period.