If the outcomes of a discrete random variable follow a Poisson distribution,then their:
A)mean equals the standard deviation.
B)mean equals the variance.
C)median equals the variance.
D)median equals the standard deviation.

Question

Quizplus · Accepted Answer

In a Poisson distribution, the mean is equal to the variance. This is a defining characteristic of the Poisson distribution. Therefore, choice B is the correct answer. Choices A, C, and D are all incorrect as they do not hold true for a Poisson distribution.

If the Outcomes of a Discrete Random Variable Follow a Poisson