exponential distribution

(40 minutes to learn)


The exponential distribution is a continuous distribution whose PDF decays exponentially. It is most commonly used to model the waiting time until an event occurs, where that event is equally likely to happen at any point in time.


This concept has the prerequisites:

Core resources (read/watch one of the following)


See also

  • The gamma distribution is a generalization of the exponential distribution.
  • The geometric distribution is a geometric analogue of the exponential distribution.
  • The exponential distribution is the only memoryless continuous distribution.
  • Equivalently, it is the only continuous distribution with constant failure rate .