SAS has several procedures that can fit a probability distribution to data, plot a histogram, and overlay one or more density estimates: PROC UNIVARIATE in Base SAS enables you to overlay parametric density curves from about 20 common continuous probability distributions, such as normal, lognormal, and gamma. It also enables you to overlay a nonparametric kernel density estimate. PROC SEVERITY in SAS/ETS software enables you to overlay density curves for severity models. It also enables you t...
