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 d_z for paired samples.
• Create appropriate visualizations for comparisons of two paired samples.

Additionally, you should be able to do the following:

• 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.