Jason (jcreed) wrote,
Jason
jcreed

I'm really amazed I haven't already heard this analogy between standard deviation and the euclidean norm explained so clearly.

http://www.johndcook.com/blog/2010/06/17/covariance-and-law-of-cosines/

The reason that the error involved in a poll of N people is asymptotically sqrt(N) is the same reason that the length of the diagonal of an N-dimensional cube is sqrt(N).
Tags: analogies, math
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