I found the following handy tip on Jonathan Deane's site (University of Surrey):

- If a
*mean*or*average*probability of an event happening per unit time/per page/per mile cycled etc., is given, and you are asked to calculate a probability of*n*events happening in a given time/number of pages/number of miles cycled, then the Poisson Distribution is used. - If, on the other hand, an
*exact probability*of an event happening is given, or implied, in the question, and you are asked to caclulate the probability of this event happening*k*times out of*n*, then the Binomial Distribution must be used.

## No comments:

Post a Comment