Q34

MCQ2 marks, −0.67

Let $x$ and $y$ be random variables, not necessarily independent, that take real values in the interval $[0,1]$ . Let $z=x y$ and let the mean values of $x, y, z$ be $\bar{x}, \bar{y}, \bar{z}$ , respectively. Which one of the following statements is TRUE?

(A)

$\bar{z}=\bar{x} \bar{y}$

(B)

$\bar{z} \leq \bar{x} \bar{y}$

(C)

$\bar{z} \geq \bar{x} \bar{y}$

(D)

$\bar{z} \leq \bar{x}$

Loading…