Intro to Probability Distributions

Discrete vs Continuous Random Variables

This video explains what a "random variable" is in Stats, as well as the difference between discrete and continuous random variables. In Stats class, you're almost always using discrete variables when doing probability problems.

The 3 Rules of Probability Distributions

This video covers a very common type of problem that's in every Stats textbook I've ever seen, where they give you a table and ask you "is this a probability distribution". You're supposed to figure it out using the three rules.