It's essential for this course that you develop a good understanding of probability.
Predictability
We all have some intuitions about probability, and one way to see that is by playing this guessing game.
Random variables
Perhaps one of the conceptually hardest parts of this course, but a vital tool for working with probabilistic models and stochastic processes.
Reading
Sharon Goldwater: Basic probability theory
An essential primer on this topic. You should consider this reading ESSENTIAL if you haven't studied probability before or it's been a while. We're adding this the readings in Module 7 to give you some time to look at it before we really need it in Module 9 - mostly we need the concepts of conditional probability and conditional independence.