Poisson

157. Poisson

Used to model the number of events that occur within a fixed interval of time or space, given a constant mean rate and assuming that these events occur independently of each other

𝑃 (𝑋 = 𝑘) = \frac{𝜆^{𝑘} 𝑒^{- 𝜆}}{𝑘!}