Xi's are iid with ~N(μ,σ^2). I am given the population variance.

http://farm4.static.flickr.com/3282/...6fc596de8b.jpg

How do you derive this (the variance part)?

http://farm4.static.flickr.com/3148/...86f10ea1d1.jpg

Thanks.

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- Nov 8th 2008, 10:50 AMkman320Variance of the population variance.
Xi's are iid with ~N(μ,σ^2). I am given the population variance.

http://farm4.static.flickr.com/3282/...6fc596de8b.jpg

How do you derive this (the variance part)?

http://farm4.static.flickr.com/3148/...86f10ea1d1.jpg

Thanks. - Nov 10th 2008, 02:55 AMmr fantastic
- Nov 10th 2008, 09:07 AMkman320
Thanks so much Mr. Fantastic. I was doing it the long and difficult way of Var(S^2)= E(S^4)-σ^4. The E(S^4) was taking forever.