4.1 Learning Objectives

After completing this lab, you should be able to do the following using R:

• Conduct χ² tests of independence of 2x2 categorical data.
• Compute Cohen’s w and odds ratios.

Additionally, you should be able to:

• Report results of χ² tests in APA style.
• Correctly interpret the results of χ² tests, including p values.
• Correctly interpret odds ratios.