STAT 3202: Lab 07, ANOVA

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Goal: After completing this lab, you should be able to…

• Perform ANOVA tests.
• Perform model diagnostics on ANOVA tets.

In this lab we will use, but not focus on…

• R Markdown. This document will serve as a template. It is pre-formatted and already contains chunks that you need to complete.

Some additional notes:

• Please see Carmen for information about submission, and grading.
• You may use this document as a template. You do not need to remove directions. Chunks that require your input have a comment indicating to do so.
• Since this week is an exam week, the hope is that it is possible to complete this lab during lab! (If not, blame Dave.)

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Exercise 0A - Pain Reduction

library(tidyverse)
library(GGally)

For this lab we will again use some elements of the tidyverse as a preview of the next lab which will focus on using the tidyverse. (And hopefully be helpful for your second group projects.) The GGally package is need to put plots created using ggplot2 side-by-side. (You may need to install this package.)

Note: To get these document easier to read, some code as been suppressed. Please see the RMarkdown document for access to all code used to create this document.

Recall the pain reduction data from class.

pain = read_csv("https://daviddalpiaz.github.io/stat3202-sp19/data/pain.csv")