Basic Statistics and Data Analysis

Statistics Lecture Notes, Online MCQs

Category: Random Variables

Random Variables

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MCQs Random Variable

The following are online quizzes containing MCQs about Random variable.

Start any of the online quizzes/exams/tests by clicking the links below.

MCQs Random Variable 6MCQs Random Variable 5MCQs Random Variable 4
MCQs Random Variable 3MCQs Random Variable 2MCQs Random Variable 1

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.

MCQs Random Variable

Random Variables

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MCQs Random Variables 4

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

1. If $Var(X) = 5$ then $Var(2X + 5) $ =

 
 
 
 

2. A discrete variable is a variable than can assume

 
 
 
 

3. If $a$ is constant then $Var(a)$ is

 
 
 
 

4. If $X$ is a random variable and $a$ and $b$ are constants, then $SD(a-bX)$ is

 
 
 
 

5. If $X_!, X_2, \cdots, X_n$ is the joint density of $n$ random variables, say $f(X_1, X_2, \cdots, X_n;\theta)$ which is considered to be a function of $\theta$. Then $L(\theta; X_1,X_2,\cdots,X_n)$ is called:

 
 
 
 

6. If $X$ and $Y$ are independent random variables then $SD(X-Y)$ will be

 
 
 
 

7. If $E(X) = 3$ then what will be $E(a+X)$, where $a$ is a constant whose value is 2

 
 
 
 

8. If $E(X) = 1.6$ then $E(5X+10) =$?

 
 
 
 

9. If $Var(X) = 2$ and $Var(Y) = 5$, and if $X$ and $Y$ are independent variables, then $Var(2X – Y)=$?

 
 
 
 

10. If $P(X=10) = \frac{1}{10}$, then $E(X)=$?

 
 
 
 

11. If $X$ is a random variable then $E(4X + 2)$ is

 
 
 
 

12. $E(X-\mu)$ = ?

 
 
 
 

13. If $X$ and $Y$ are two independent variables then $E(XY)=$

 
 
 
 

14. If $Var(X) = 8$ then $Var(X+3)= $

 
 
 
 

15. If $X$ and $Y$ are random variables then $E(X-Y)$ is

 
 
 
 

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

Random Variables

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Random Variables Quiz 3

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

Please go to Random Variables Quiz 3 to view the test

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

Random Variables

 by 

MCQs Random Variables 2

This test contains MCQs about Random Variables. Let us Start with the MCQs test about Random Variables.

Please go to MCQs Random Variables 2 to view the test

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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