After reading this chapter, you should be able to:

 

1. Describe the between-subjects design, and identify two appropriate sampling methods used to select independent samples.

 

2. Calculate the degrees of freedom for a two–independent sample t test, and locate critical values in the t table.

 

3. Identify the assumptions for the two–independent sample t test.

 

4. Compute a two–independent sample t test and interpret the results.

 

5. Compute and interpret effect size and proportion of variance for a two–independent sample t test.

 

6. Compute and interpret confidence intervals for a two-independent sample t test.

 

7. Summarize the results of a two–independent sample t test in APA format.

 

8. Compute a two–independent sample t test and identify confidence intervals using SPSS.