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Expectation of x^2 
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#1
Sep2911, 02:39 AM

P: 2

How to calculate E(x^2) given that x are i.i.d random variables distributed as a standard normal i.e. N(0,1) ?
Thank you. 


#2
Sep2911, 03:17 AM

P: 4,573

Do you know the relationship for Variance to second and first order moments? [HINT: Var(X) = E[X^2]  {E[X]}^2]. What do you know about the mean and variance of your distribution? 


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