Try to compare two class variables on a single histogram for a single response variable. The SAS tech support said that proc capability was not available in the University Edition.
You might look at PROC UNIVARIATE. In particular, look at Example 4.16 Creating a Two-Way Comparative Histogram. The results are paneled, and not overlaid.
ANOVA, or Analysis Of Variance, is used to compare the averages or means of two or more populations to better understand how they differ. Watch this tutorial for more.