text: The clustering of viola tricolor was an application of a process with this name by Svedberg.
full_question: The clustering of viola tricolor was an application of a process with this name by Svedberg. Conway and Maxwell adapted the distribution with this name to model overdispertion and underdispersion. The distribution with this name has a single mode if its parameter lambda is not an integer but two modes if it is and for large lambda can be well approximated by a normal distribution with mean lambda and variance lambda.  For 10 points, what French statistician lends his name to a discrete probability distribution used to calculate the number of independent events occurring in a fixed interval at a constant rate?
first_sentence: The clustering of viola tricolor was an application of a process with this name by Svedberg.