it's fourteen season of data -- why is that not a large enough sample size? also, this is an abstract comparison, but to say the number of games is going to change the final conclusion is nuts, imo.
14 x 16 = 224 games, that's a good sample size. when all teams are included, the size increases to 224 x 16 = 3,584 games which is more than enough sample data imo.
if you reduced the numbers in each sport to 3,584 games, I don't think these charts will change much, really. in fact, it may make football even more varied, by comparison.
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