StatCalc: Statistical Calculators


To analyze the Poisson distribution, enter the expected number of positive outcomes in Expected # of events and the value of positive outcomes you would like to determine the probability of in Observed # of events.

StatCalc showing a Poisson rare event versus standard distribution.

Figure 10.14: Poisson Distribution

The results show that there is a 0.13% chance of having six or more positive outcomes when the expected value is 1.16. Additional percentages are stated for the ranges outlined in the left column of the table.