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11-11-2011 @ 9:17PM
I'd imagine that wealthier players would have been the ones answering this survey because poorer players are generally newer players and they haven't played long enough to go out and search for wow resources and answer surveys and whatnot.
11-12-2011 @ 1:06AM
You're exactly right, and it's called self-selection bias. Probably a large part of their responses were from people who visit sites like this one. But that is one of the very first errors they mention in the details: An opt-in survey.
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