17 Distributions and models
So far, you have learnt to ask a RQ, identify different ways of obtaining data, design the study, collect the data describe the data, summarise data graphically and numerically, and understand the decision-making process.
In this chapter, you will learn about distributions and models to describe the distribution of populations and samples. You will learn to:
- describe distributions.
- describe populations using normal distributions.
- use \(z\)-scores to compute probabilities related to normal distributions.
- use \(z\)-scores to ‘work backwards’ from probabilities for normal distributions.