This test contains MCQs about the Random Variable Quiz. Let us Start with the MCQs test for Random Variable Quiz.
Online MCQs about Random Variables with Answers
A Random Variable (random quantity or stochastic variable) is a set of possible values from a random experiment.
MCQs Random Variable Quiz
- If $X$ and $Y$ are independent random variables then $E(XY)$ is equal to
- If $X$ and $Y$ are independent random variables then $VAR(X-Y)$ is equal to
- If $X$ is a random variables, $a$ and $b$ are constants then $E(aX+b)$ is equal to
- If $X$ is a random varaible, then $Var(2-3X)$ is
- $Var(2X+5) =$ ?
- $Var(X+4)=$?
- $Var(X/3)=$?
- If $Var(X) = 4$ then $Var(3X+5)$ is equal to
- If $SD(X) = 3$ then $SD(X+4/6)$ is
- If $X$ and $Y$ are independent then $Var(X-Y)$ is
- $Var(3X – 4Y)=$?
- A continuous random variable is a random variable that can
- For a continuous random variable, the area under the probability distribution curve between any two points is always
- The probability that a continuous random variable assumes a single value is
- For a continuous random variable $X$, the total probability of the mutually exclusive events (intervals) within which $X$ can assume a value is
- If $X\sim N(\mu, \sigma^2)$ where $a$ and $b$ are real numbers, then variance of $(aX+b)$ is
- For a normal distribution, the $Z$ value for an $X$ value is to the right of the mean is always
- If $X$ follows t-distribution with $v$ degrees of freedom then the distribution of $x^2$ is
- The distribution function $F(x)$ is equal to
- If $X$ is a continuous random variable, then function $f(x)$ is
The domain of a random variable is called sample space. For example, in the case of a coin toss experiment, there are only two possible outcomes, namely heads or tails. A random variable can be either discrete or continuous. The discrete random variable takes only certain values such as 1, 2, 3, etc., and a continuous random variable can take any value within a range such as the height of persons.
Learn about Pseudo-Random Numbers