MCQs Random Variables 2

1. For a continuous random variable, the area under the probability distribution curve between any two points is always

2. If $SD(X) = 3$ then $SD(X+4/6)$ is

3. If $X$ and $Y$ are independent random variables then $VAR(X-Y)$ is equal to

4. For a continuous random variable $X$, the total probability of the mutually exclusive events (intervals) within which $X$ can assume a value is

5. $Var(X/3)=$?

6. If $X$ and $Y$ are independent then $Var(X-Y)$ is

7. The probability that a continuous random variable assumes a single value is

8. If $X$ and $Y$ are independent random variables then $E(XY)$ is equal to

9. If $X$ is a random varaible, then $Var(2-3X)$ is

10. A continuous random variable is a random variable that can

11. $Var(3X – 4Y)=$?

12. If $X$ is a random variables, $a$ and $b$ are constants then $E(aX+b)$ is equal to

13. $Var(2X+5) =$ ?

14. If $Var(X) = 4$ then $Var(3X+5)$ is equal to

15. $Var(X+4)=$?