A discrete probability distribution that expresses the probability of a given number of events occurring over a fixed period of time or space is called a Poisson distribution if :
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → The events occur with a known constant mean rate
A Poisson distribution have following assumptions.
(A) The event occur independently of each other.
(B) The average rate of occurrence is constant.
(C) The events are rare relative.