Learning Paths
Each learning path is one chapter: a guided route through a topic, one small course at a time. Pick a class to see its chapters in order.
Chapter 4
Random Variables and Distributions, Probability and Chance, Spread of Data
How many brothers and sisters does a student picked at random have? How many seeds in a packet will grow? How tall is the next person through the door? Each answer is a number that changes by chance, and each follows a pattern that we can describe. This chapter turns chance into numbers. You will build a probability distribution, find its long-run mean and its spread, count successes with the binomial model, and work with the bell-shaped normal curve and its areas. Every idea is met first in a made-up data set or a simulation, and short Python programs check each result.
3 courses
