Probability plot correlation coefficient plot

The probability plot correlation coefficient (PPCC) plot is a graphical technique for identifying the shape parameter for a distributional family that best describes the data set. This technique is appropriate for families, such as the Weibull or the generalized Gaussian distribution, that are defined by a single shape parameter and location and scale parameters, and it is not appropriate or even possible for distributions, such as the normal, that are defined only by location and scale parameters.

Source: Wikipedia — Probability plot correlation coefficient plot (CC BY-SA 4.0)