6.1 Learning Objectives

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

  • Conduct paired samples t tests.
  • Compute Cohen’s dz for paired samples.
  • Create appropriate visualizations for comparisons of two paired samples.

Additionally, you should be able to:

  • Explain how paired samples t tests are similar (and distinct) from one sample t tests.
  • Evaluate the assumptions of paired samples t tests.
  • Accurately interpret the results of paired samples t tests.
  • Report the results of paired samples t tests in APA style.