MCQs Random Variables 1

This test contains MCQs about Random Variables.

1. Height measurements of 50 students studying in a college

2. A quantity which can vary from one individual to another is called

3. If $X$ and $Y$ are random variables then $E(X+Y)$ is equal to

4. A variable whose value is determined by the outcome of a random experiment is called

5. Suppose, four coins are tossed, the value of a random variable $H$ (No. of heads) is:

6. The sum of probabilities of a discrete random variable is

7. A random variable assuming an infinite number of values is called

8. The lifetime of a car tire is

9. A random variable assuming only a finite number of values is called:

10. The speed of the car is an example of

11. Random numbers can be generated mechanically by

12. The number of students in a class is an example of

13. If $x$ is a discrete random variable, the function $f(x)$ is

14. A random variable is also called

15. A variable which can assume each and every value within a given range is called

A Random Variable (random quantity or stochastic variable) is a set of possible values from a random experiment.

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.