The Poisson distribution is a discrete probability distribution that expresses the probability of a given number of events occurring within a fixed interval of time or space, given that these events occur with a known constant mean rate and are independent of the time since the last event. It is particularly useful in scenarios where events happen at a constant average rate, such as the number of phone calls received by a call center in an hour or the number of emails received per day. This distribution helps in understanding rare events and is crucial for decision-making based on event occurrence probabilities.
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