what is the mean and variance of random variable which type of variable has a mean and variance calculate the mean of the variable by the random number how to find the mean and variance for random variable what is the average variance for a random variable? what is the variance of the random variable? how to calculate mean variance of random variable how do you calculate variance in n calculating variance of random variable when to use mathbb how to find the mean and variance of each variable in a calculator how do I calculate variance of the sum of a random variable? how do you find the variance of the random variable average variable variance how to calculate variance with a p value how to find variance and mean in math equation uk how do you find the variance of an integer what is the variance of a random variable what is the variance of a random variable in maths variance of sum of random number of variable