As with all probability distributions, the Normal Distribution describes how the values of your data are distributed.

Unlike Q-Q and probability plots, P-P plots are not invariant to changes in location and scale. See CAPPP2 in the SAS/QC Sample Library For example, the data in the "Getting Started" section are ...

Q-Q plots are more convenient than probability plots for graphical estimation of the location and scale parameters since the x-axis of a Q-Q plot is scaled linearly. On the other hand, probability ...