dse 2010 doubt

Posted by bhawna on Jun 26, 2014; 2:35pm
URL: http://discussion-forum.276.s1.nabble.com/dse-2010-doubt-tp7593659.html

Let X be normally distributed random variable with mean 0 and variance sigma^2. Then the mean of X^2 is
1. 0
2. Sigma
3.2×sigma
4. Sigma^2