I need some help on this:

E(X)=(1/(sigma(sqrt (2pi))) ∫(-infinity to infinity) xexp(-(x-m)^2/(2sigma^2)dx

Show E(X)=m.

I know to add and subtract m to the first x, but I don't know where to go from there.

Thanks for any help.

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- Jun 8th 2008, 01:28 PMtaypezExpected Value and Variance
I need some help on this:

E(X)=(1/(sigma(sqrt (2pi))) ∫(-infinity to infinity) xexp(-(x-m)^2/(2sigma^2)dx

Show E(X)=m.

I know to add and subtract m to the first x, but I don't know where to go from there.

Thanks for any help.

- Jun 8th 2008, 08:07 PMmr fantastic