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edited Oct 24, 2009 at 10:11

Ilya Nikokoshev

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why is it so cool to square numbers? (in terms of finding the standard deviation)

So when we want to find the standard deviation of {1,2,2,3,5} we do

http://controls.engin.umich.edu/wiki/images/math/0/0/6/00665fe48315006861c0755b6081bc49.png

why do we need to square and then square root the numbers?

st.statistics pr.probability

asked Oct 18, 2009 at 16:59

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