what is the standard deviation of xyy what is normal distribution and normal distribution how to subtract variance from normal distribution what is normal distribution of p(x)y what are the distributions of variance if an event is a random variable and a normal distribution is present, the mean of the variable is ________. what is the normal distribution of variable yyy how to find standard deviation for variance how to calculate the standard deviation of a random variable how to find the variance of variable p how to calculate the standard deviation of a random variable what is the standard deviation of a r variable what is y in the normal distribution what is p(x>y)$ if the variance is one random type of variable, the mean of the variable will be average distribution in statistics what is the probability of one random variable being greater or less than another using a normal distribution what is the standard deviation of p(x>y)$? what is the variance in a random variable what is the standard deviation in p(x)y and y