Since many students find the "Statistical Inference" section of Mathematics B difficult, I have considered the reasons ...

A random variable that can take only a certain specified set of individual possible values-for example, the positive integers 1, 2, 3, . . . For example, stock prices are discrete random variables, ...

A presentation that shows students how to show discrete random variables in different ways. It also shows how to find the mean and variance of discrete random variables and how to use linear scaling ...

These notes support teaching and revision of discrete random variables and expected value for IB Maths AI SL. Students work with discrete probability distributions, check that probabilities sum to 1, ...