When using a Poisson distribution to approximate a binomial distribution, the mean of the Poisson distribution is np where n is the sample size and p is the probability of an event of interest.

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Quizplus · Accepted Answer

This statement is true. The Poisson distribution can be used to approximate the binomial distribution when n is large and p is small, and the mean of the Poisson distribution in this case is equal to np.

When Using a Poisson Distribution to Approximate a Binomial Distribution