why does a quantile function need to be inverse of the mean is the normal mean of the random variable an integral? does the mean of a random variable always equal the integral of their quantile function? what is the function mean does univariate random variable's value always equal the integral? what is the quantile integral of the univariate random variable what does random variable mean in sqrt does an integral of a variable always represent a variable does the quantile function of the univariate random variable mean what does normalqf equal does random variable mean always equal the integral of its quantile function what is the integral of a random variable does a univariate random variable's mean always equal its quantile function what makes a quantile integral does integrating a univariate random variable in a quad always equal the integral of its quantile function does a random variable's mean always equal equal the integral of its quantile function? does a cdf equal the integral do you find the mean of the random variable do univariate random variable mean does a univariate random variable always equal the integral of its quantile function?