Random Variables Quiz 3

This quiz contains MCQs about Random Variables. Let us start with the Online Random Variables Quiz,

1. If $X$ and $Y$ are random variables, then $E(X-Y)$ is equal to

 
 
 
 

2. Which of the following is a characteristic of the probability distribution of a random variable?

 
 
 
 

3. The number of children in a family is an example of ________ variable

 
 
 
 

4. In generating random numbers the probability of each digit/number is

 
 
 
 

5. Discrete data is usually generated by the process

 
 
 
 

6. The amount of milk produced by a cow is _________ variable

 
 
 
 

7. In a family with two children, how many are girls there

 
 
 
 

8. The number of deaths in a road accident is an example of ____________ variable

 
 
 
 

9. The set of all possible outcomes of a random experiment is called

 
 
 
 

10. Usually measurements give rise to ________ data

 
 
 
 

11. A variable which takes measurable values is called a

 
 
 
 

12. Random numbers are generated by some

 
 
 
 

13. A Chi-Square random variable can assume the value

 
 
 
 

14. The number of automobile accidents per year in Multan city is an example of

 
 
 
 

15. If $X$ and $Y$ are independent random variables, then $Var(X-Y)$ is equal to

 
 
 
 

16. Continuous variable can assume ___________ values

 
 
 
 

17. A variable which can assume all values in the range is called

 
 
 
 

18. Sum of dots when two dice are rolled is an example of

 
 
 
 

19. A discrete variable is also called

 
 
 
 

20. In generating random number there are _________ number of assumptions to follow

 
 
 
 


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.

Learn about Pseudo-Random Numbers

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