Let X be a real-valued random variable with E[X] and E[X2] denoting the mean values of X and X2, respectively. The relation which always holds is

Let X be a real-valued random variable with E[X] and E[X2] denoting th

1.	Let X be a real-valued random variable with E[X] and E[X2] denoting the mean values of X and X2, respectively. The relation which always holds is
A.	(E[X])2 > E(X2)
B.	E(X2) ≥ (E[X])2
C.	E[X2] = (E[X])2
D.	E[X2] > (E[X])2
Answer» C. E[X2] = (E[X])2

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Let X be a real-valued random variable with E[X] and E[X2] denoting the mean values of X and X2, respectively. The relation which always holds is

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