Random variables can be any outcomes from some chance process, like how many heads will occur in a series of 20 flips of a coin. We calculate probabilities of random variables and …

A random variable is some outcome from a chance process, like how many heads will occur in a series of 20 flips, or how many seconds it took someone to read this sentence. Calculate …

Random variables are really ways to map outcomes of random processes to numbers. So if you have a random process, like you're flipping a coin or you're rolling dice or you are measuring …

Learn statistics and probability—everything you'd want to know about descriptive and inferential statistics.

Practice Up next for you: Constructing probability distributions Get 3 of 4 questions to level up!

Discrete random variables can only take on a finite number of values. For example, the outcome of rolling a die is a discrete random variable, as it can only land on one of six possible …

Random variables are really ways to map outcomes of random processes to numbers. So if you have a random process, like you're flipping a coin or you're rolling dice or you are measuring …

A random variable is some outcome from a chance process, like how many heads will occur in a series of 20 flips, or how many seconds it took someone to read this sentence. Calculate …

Learn high school statistics—scatterplots, two-way tables, normal distributions, binomial probability, and more.

And as we will see as we build up our understanding of them, not only are they interesting in their own right, but there's a lot of very powerful probability and statistics that we can do based on …