When you use the Poisson distribution to approximate the binomial distribution, the mean is nπ where n is the sample size and π is the probability of an event of interest.

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Quizplus · Accepted Answer

This is correct, as the Poisson distribution is often used as an approximation for the binomial distribution when the sample size is very large and the probability of success is very small. In this case, the mean of the Poisson distribution is nπ, where n is the sample size and π is the probability of an event of interest.

When You Use the Poisson Distribution to Approximate the Binomial