Apparently, PROC GLM does not share PROC TTEST's feature to accept summary statistics as input data for certain analyses.   However, a bit of googling yields: A thread from 2012 where a possible workaround -- disaggregating the data using a macro written by Michael Friendly -- and the caveats of doing so were discussed: https://communities.sas.com/t5/SAS-Statistical-Procedures/how-to-perform-t-test-or-anova-test/td-p/124831?start=0&tstart=0 A website providing a download link and explanations of the abovementioned macro: http://www.datavis.ca/sasmac/stat2dat.html Conference papers on this topic with code and examples: from 1991, 2006 and 2014. ... View more