---
title: "S4R: Classes 21 and 22, Contingency tables"
author: "Your Name Here"
date: "`r format(Sys.time(), '%B %d, %Y')`"
output:
html_document:
toc: true
---
---
# Rubric
1. Contingency tables.
Using two categorical variables with two to five levels each,
specify a hypothesis test for homogeneity of proportions associated with your research questions.
* (2 p) Specify the hypotheses in words and notation.
* (2 p) State the conclusion of the test in the context of the problem.
* (1 p) Check the assumptions of the test.
* (1 p) Indicate which cells have Pearson residuals more extreme than $\pm 2$.
* (2 p) Plot a mosaic plot of the data and Pearson residuals.
* (2 p) Interpret the mosaic plot with reference to the Pearson residuals.
Turn in your master HW file with these sections appended to the bottom.
---
Class 21: Parts 1-3 from above with points for each part: 4, 4, 2.
Class 22: All parts from above, with a focus on the last two.
The sections from Erik's `S4R_Project_All_Erik_NESARC.Rmd` file to focus on are
* Class 21 Contingency tables