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Midterm prep: categorical data, GLMs
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Module 2
Contingency Table Analysis: Chi-Square and Fisher's Tests
1
Calculating Chi-Square for Contingency Tables
Compute expected frequencies and the Pearson chi-square statistic for a contingency table.
2
Calculating Degrees of Freedom for Chi-Square Tests
Determine the degrees of freedom for a chi-square test to find a p-value and draw a conclusion.
3
Exact Tests for Small Expected Frequencies
Identify when an exact test is required due to small expected frequencies (<5).
4
Fisher's Exact Test: Calculating Exact Probabilities for 2x2 Tables
For a 2x2 table, compute the probability of the observed table and more extreme tables to perform Fisher's exact test.
5
Fisher's Exact vs. Permutation Chi-Square for R x C Tables
Distinguish between the generalized Fisher's exact test and the permutation chi-square test for r×c tables.
6
Relative Risk vs. Odds Ratio: When to Use Which
Determine when to report relative risk versus odds ratio as a measure of association strength in 2x2 tables.
Previous module
Foundations of Categorical Data
Next module
Introduction to Generalized Linear Models (GLMs)