Question: 2. Poisson Distribution The random variable x represents the number of phone calls received in an hour, and it has a Poisson distribution with a

2. Poisson Distribution The random variable x represents the number of phone calls received in an hour, and it has a Poisson distribution with a mean of 9. What is its standard deviation? What is its variance?

3. Parameters When attempting to apply the Poisson distribution, which of the following must be known: mean, standard deviation, variance, shape of the distribution?

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