what is the range for the value value for $r what are the gaussian random variables and their mean values when the mean of a function is well-defined what is the value of $r what is the mean of the function of $R$ in math how to determine the mean of r in a gaussian function? what is the function of $r what is a mean function of a random variable which random variable must exist for the range r r_ is a function that is well defined and is independent of the random variable $k$ how do you determine the mean of $r which random variable have the second largest magnitude? if the mean of a function of $k$ is well-defined, what is the mean of the functions of $r? what is the mean of the function of r$ what is the mean range of $r what is the mean of $r how to find the mean of $r what would the function of $r be when a function of $r$ is well defined, the mean of the function must exist