Bayesian Analysis with Python - Second Edition

Poisson distribution

Imagine we are counting the number of red cars passing through an avenue per hour. We could use Poisson distribution to describe this data. Poisson distribution is generally used to describe the probability of a given number of events occurring on a fixed time/space interval. Thus, the Poisson distribution assumes that the events occur independently of each other and at a fixed interval of time and/or space. This discrete distribution is parametrized using only one value, (the rate, also commonly represented with the Greek letter ). corresponds to the mean and also the variance of the distribution. The probability mass ...