Is it OK to ask a school about average GRE scores and other admission information? I am looking at applying to a couple of schools abroad (for math grad school), and outside of the fact that they are fairly well known, I have little idea about how competitive they are to get into. Internet searches haven't really helped me out, so I am wondering if it is it acceptable to email a school about what the school's expected/average GRE general and subject tests scores are for a given Ph.D. or Master's program are and how the school feels about a student coming from my background.
American grad schools generally run admissions through departments rather than the central administration. Ask the graduate student advisor (usually listed in the faculty web site) -- or your cognizant POI. They may not have a data about averages, though, as GREs tend to be deprecated except as a first-round screening mechanism.