After reading this chapter, you should be able to:

 

1. Describe two types of research designs used when we select related samples.

 

2. Explain why difference scores are computed for the related samples t test.

 

3. State three advantages for selecting related samples.

 

4. Calculate the degrees of freedom for a related samples t test and locate critical values in the t table.

 

5. Identify the assumptions for the related samples t test.

 

6. Compute a related samples t test and interpret the results.

 

7. Compute and interpret effect size and proportion of variance for a related samples t test.

 

8. Compute and interpret confidence intervals for a related samples t test.

 

9. Summarize the results of a related samples t test in APA format.

 

10. Compute a related samples t test and identify confidence intervals using SPSS.