Poisson distribution is a discrete probability distribution that describes the probability of a given number of events occurring in a fixed time interval. Instead of time intervals, units of length, space, etc., can be used, too. Poisson distribution describes the behavior of the so called rare events that have a small probability of occurrence, and thus even in a large amount of observation their appearance is infrequent. Poisson distribution is often used in the analysis of stochastic processes, especially in the so called Poisson process. Phenomena that are well-modelled by this process are, e.g. requests for telephone calls at a switchboard or particle emissions due to radioactive decay.
The program enables to work with the Poisson probability distribution. For given parameter lambda (average rate of the event occurrence), the probability mass function, mean, variance, modus and median of the distribution are computed. The graphs of probability mass function and distribution function are shown. The user can also evaluate probability that the random variable lies in the given range.

The software will launch in a separate window. Java (free) must be installed on a client computer. When launching the software the browser might display a security warning and ask whether to block a potentially dangerous content. Click No (i.e. don't block).

When closing the software we recommend to close the browser tab that opened it. When closing the application itself (not the browser tab), the browser might attempt to recover the tab which might result in the browser crash. You can prevent this by disabling the automatic crash recovery feature of your browser.

For research and scientific activities the software is available free of charge. In all other cases contact RNDr. M. Novák, Ph.D., Vysoké učení technické v Brně, UMAT FEKT, Technická 8, 616 00 Brno, email: novakm@feec.vutbr.cz, phone: 541143135.

I. Hlavičková, H. Halfarová supported by 1100 - základní činnost