# Question: Use the characteristic function or the moment generating function or

Use the characteristic function (or the moment- generating function or the probability-generating function) to show that a Poisson PMF is the limit of a binomial PMF with n approaching infinity and p approaching zero in such a way that np = ยต = constant .

## Relevant Questions

Find the mean of the random variables described by each of the following probability density functions: (a) (b) (c) (d) Find the first three moments of a Poisson random variable whose PMF is Prove that all odd central moments of a Gaussian random variable are equal to zero. Furthermore, develop an expression for all even central moments of a Gaussian random variable. Find the variance and coefficient of skewness for a Poisson random variable whose PMF is Let X be a standard normal random variable (i. e., X ~ N ( 0,1)). Find the PDF of Y= |X|.Post your question