(This article was originally published at Statistical Modeling, Causal Inference, and Social Science, and syndicated at StatsBlogs.)
Phil writes:
This is kind of fun (at least for me): You would probably guess, correctly, that membership in the US Chess Federation is lower than its peak. Guess the year of peak membership, and the decline (as a percentage) in the number of members from that peak.
My reply: I don’t know, but I’d guess that the fraction of members who are kids is much higher than in the past.
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