I derive the mean and variance of the binomial distribution. I do this in two ways. First, I assume that we know the mean and variance of the Bernoulli distribution, ...
An introduction to the expected value and variance of discrete random variables. The formulas are introduced, explained, and an example is worked through.
statisticslectures.com - where you can find free lectures, videos, and exercises, as well as get your questions answered on our forums!