Let X be a random variable. Then, **E**[X^2] > = **E**[X] . Is it always true?

Suppose that, X is a random variable, taking positive integer values, which satisfies **E**[(X−6)^2]=0. Then, pX(4)=pX(5). Is it always true?

Suppose that **E**[X] > = 0. Then, X > = 0 with probability 1, i.e., **P**(X >=0) =1 . Is it always true?

#### Top Answer

1) it is always true 2) it... View the full answer