PROCs STANDARD and RANK are simple procedures that produce no output, but create transformed versions of the variables in a data set. PROC STANDARD can be used to center a random variable and/or re-scale it to have a desired standard deviation. Its most common use is to transform a variable into a Z score, which is a re-scaled version of the variable with mean 0 and SD 1. PROC RANK produces ranks, which are useful for a variety of purposes, including analysis via nonparametric statistical methods, many of which utilize ranks in place of the variable(s) on its(their) original scale.