what is pt rnorm how to calculate the sum of the variances of two randomly transformed variables? when the sum of a variable is normal, if the sum of variance of a variable is standard normal, the standard deviation is what is the function of the sum of two normally distributed t what is standard normal distribution what is the sum of the sum of the variances of the transformed variable? pt2 is a normal distributed variable what is the standard deviation of pt how to simulate sum of two normal distributed variables when linearly transformed when the sum of the variances of two randomly transformed variable is normally distributed what is the sum of two normal distributed variables what is standard deviation of pt why is pt a standard normal variable? how to simulate the sum of two normal distributed variables when linearly transformed which term would be described as the standard normal distributed variable? what is the standard deviation in a linear transform what is pt in math what is the pt of standard normal what is normal deviation for variable