Overview: In probability and statistics, it is important to understand the mean and variance for any random variables. In many applications, it is straightforward to simulate the random variable Y ’s, ...

The MOOCs I learnt myself. The repo is kept as a record for myself. - Mooc/6.431x/Unit 4 Discrete random variables/Lec. 6 Variance; Conditioning on an event; Multiple r.v.'s/L6 exercises.md at master ...

A simple exact formula for the variance of the product of two random variables, say, x and y, is given as a function of the means and central product-moments of x and y. The usual approximate variance ...