Variance as central moment
- From: shehry@xxxxxxxxx
- Date: 28 Mar 2006 03:38:02 -0800
Hi,
i am new to statistics and i was reading the 'variance' and the
'central moment' pages at wikipedia. I read that variance was the
second central moment. And that the idea of the central moments came in
from the moment theory in physics.
i have been trying to relate the two concepts (moment in physics and
moment in stats) but i am still not sure. the way i see it, variance
gives the spread about the mean position (the axis of rotation). but is
that the only relationship between the physics and stats concept???
plus i read that the third and the fourth central moments are skewness
and kurtosis. can i get any help concerning regarding those two as
well. i would really like to know how they came to be known as the
third and fourth central moments.
thanks
.
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