Originally Posted by porciuscato

I appreciate your efforts and I don't mean to be blunt, but despite references to P values, t-statistics &etc., your method is statistically invalid. The averages you are using are not the average of what it took to get in to GS; they are the averages of people who happened to get in -- which is a very different thing. Just a few people with big surpluses over what was actually required to get in (say $80K or 100K PQD), easily skews the average higher. Likewise, if there is a large contingent who just barely made the requirement, the average would be skewed lower. Either way, they are useless averages.

This is akin to trying to compare the freezing points for different liquids by averaging the temperatures of different samples you happen to find in a liquid state. All you know is that they are above the freezing point; but you have no idea by how much.