Another question for you all-
Let x1, x2,...xn be a random sample. Show that
http://i.imgur.com/mCD3r.jpg
or S^2 = 1/2n(n-1) summation(summation( (Xi - Xj)^2 )
It's a little blurry ( I know ), but how would I go about showing that the sample variance is equal to that?
My best guess is to pull the 2n on the bottom in and turning all the xj's to x bar.
Thanks for your help!