Hi everybody,

I encountered this to me very confusing problem in the context of confidence intervals and pivotal quantities.

How can I compute the mean and the variance (marked yellow) with this information below...

Many thanks once more!

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- Jan 15th 2012, 05:05 PMMarmyMean and Variance
Hi everybody,

I encountered this to me very confusing problem in the context of confidence intervals and pivotal quantities.

How can I compute the mean and the variance (marked yellow) with this information below...

Many thanks once more! - Jan 16th 2012, 03:50 PMMooRe: Mean and Variance
Hello,

The only random stuff in is . So if you treat everything else as a constant, it's pretty easy to compute the mean and the variance !

After that, it's just a matter of computing double sums :)

Let's try it ! - Jan 17th 2012, 08:25 AMMarmyRe: Mean and Variance
Thanks, I think I found out now!