Use this test when you're checking to see if one category is preferred over others in a single population distribution.

# Chapter 15: Chi-Squared Tests

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## Lessons

## 15.1 | Goodness of Fit (equal proportions)

## 15.1 | Goodness of Fit (given a distribution)

Use this test when you're checking to see how well the distribution of categories in the sample fits to the expected distribution (usually given in the form of list of categories in a population and their proportions).

## 15.2 | Contingency Table Test

This is the χ^{2} test to use when you have samples from two groups, and you want to see if an individual's group influences the distribution of categories they fit into. For example: do males and females choose the same distribution of majors at college?

## Multiple Choice

Test your understanding of Chapter 15: Chi-Squared Tests. Each question is accompanied by a mini-video lecture showing you how I decided which solution was the correct one.