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.