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## Chi-Square Test

Lesson Plans
1. Chi-Square Test (Columbia.edu)
Provides lessons on the chi-square test. 8-05

Papers
1. Chi-Square Test - Pearson's (Wikipedia.org)
Provides a description of the test. "It tests a null hypothesis that the relative frequencies of occurrence of observed events follow a specified frequency distribution. The events must be mutually exclusive."

2. Chi-Square Test and Two-Way Tables (Yale.edu)
"When analysis of categorical data is concerned with more than one variable, two-way tables (also known as contingency tables) are employed. These tables provide a foundation for statistical inference, where statistical tests question the relationship between the variables on the basis of the data observed." Provides a full example of how the chi-square test is used with two-way tables.

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