The variance of random variable X i.e. \(\sigma_{x}^{2}\) or var (is equal to
A. E(X2) + [E(X2)2]2
B. E(X) – [E(X2)]
C. E(X2) – [E(X)]2
D. None of these
Answer:C
The variance of random variable X i.e. \(\sigma_{x}^{2}\) or var (is equal to
A. E(X2) + [E(X2)2]2 B. E(X) – [E(X2)] C. E(X2) – [E(X)]2 D. None of these