Well, I was interested in how they got their data from my undergrad, Cornell, so I went looking... Cornell publishes median grades, and they "estimated" the me

Well, I was interested in how they got their data from my undergrad, Cornell, so I went looking... Cornell publishes median grades, and they "estimated" the mean GPA from the medians. As far as I know, there's no statistically valid way to do that. You would have to assume a normal distribution, and I know for a fact that many of the courses do not have one. There could be a systemic bias if private schools differ in the way they report their data. For instance, are public schools required to report mean GPAs, whereas private schools can cherry pick their data?