 # Random Variable

Videos and lessons to help High School students learn how to define a random variable for a quantity of interest by assigning a numerical value to each event in a sample space; graph the corresponding probability distribution using the same graphical displays as for data distributions.

Common Core: HSS-MD.A.1

Introduction to Random Variables
Introduction to random variables and probability distribution functions.

Random Variable Basics
In this video we discuss the basics of random variables for statistics and finite mathematics. What is a random variable? How do we use simple random variables to model basic experiments and record observations about the frequency of certain events? Several real-world examples are included to make the concepts concrete.

Random Variables - Definition and Cumulative Density Function (CDF)
Intuitive examples. Definition of a random variable. CDF of a random variable. Distribution of a random variable.

Introduction to Discrete Random Variables and Discrete Probability Distributions
An introduction to discrete random variables and discrete probability distributions. A few examples of discrete and continuous random variables are discussed.

Graphing a Normal PDF and CDF
This video shows how to graph the Probability Density Function and the Cumulative Density Function of normal random variables using Excel.

Probability Density Functions
Probability density functions for continuous random variables.

Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations. 