rescale: Function to convert scores to ``conventional
" metrics
Description
Psychologists frequently report data in terms of transformed scales such as ``IQ" (mean=100, sd=15, ``SAT/GRE" (mean=500, sd=100), ``ACT" (mean=18, sd=6), ``T-scores" (mean=50, sd=10), or ``Stanines" (mean=5, sd=2). The rescale function converts the data to standard scores and then rescales to the specified mean and standard deviation