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Random Variables Quizzes, Questions & Answers

All Grades

Top Trending Random Variables Quizzes

Discrete vs Continuous Random Variables Quiz

This Discrete vs Continuous Random Variables Quiz evaluates your grasp of two essential concepts in probability and statistics. You'll examine the distinctions between these variable types, recognize examples, compute...

Questions: 15 | Attempts: 15 | Last updated: Apr 15, 2026

Sample Question 1
Which of the following best describes a discrete random variable?

Takes any value in an interval and can be measured precisely

Takes on a countable set of distinct values, often whole numbers

Always has a normal distribution

Cannot be graphed on a number line

Sample Question 2
A continuous random variable differs from a discrete one because it:

Has a finite number of possible outcomes

Can take any value within a given range or interval

Must follow a uniform distribution

Cannot have a probability density function

Expected Outcomes from Random Variables Quiz

This quiz evaluates your grasp of random variables, probability distributions, and expected value at the college level. You will engage with both discrete and continuous distributions, compute expectations and variances, and...

Questions: 15 | Attempts: 12 | Last updated: Apr 15, 2026

Sample Question 1
A random variable X can take values 1, 2, or 3 with probabilities 0.2, 0.5, and 0.3 respectively. What is E[X]?

1.5

2.1

2.5

3.0

Sample Question 2
Which of the following best describes a discrete random variable?

Takes any value in an interval

Takes only countable, isolated values

Must be normally distributed

Has infinite variance

Recent Random Variables Quizzes

Random Variables in Economic Models Quiz

Questions: 15 | Attempts: 10 | Last updated: Apr 15, 2026

Sample Question
A discrete random variable X represents annual stock returns (in %). If P(X=5)=0.3, P(X=10)=0.5, and P(X=−5)=0.2, what is E[X]?

5.5%

6.5%

7.0%

8.5%

Probability Functions of Random Variables Quiz

Questions: 15 | Attempts: 10 | Last updated: Apr 15, 2026

Sample Question
A discrete random variable X has probability mass function P(X=k) = c/k² for k=1,2,3. What is the value of c?

π²/6

6/π²

1

1/2

Concept of Random Variables Quiz

Questions: 15 | Attempts: 10 | Last updated: Apr 15, 2026

Sample Question
A random variable is a function that assigns numerical values to outcomes of a random experiment. Which statement best describes a discrete random variable?

It can take any value in an interval

It can take only specific, countable values

It must always be positive

It changes continuously over time