After reading this chapter, you should be able to:

 

1. Explain why a t distribution is associated with n – 1 degrees of freedom and describe the information that is conveyed by the t statistic.

 

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

 

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

 

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

 

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

 

6. Describe the process of estimation and identify two types of estimation.

 

7. Compute and interpret confidence intervals for the one-sample t test.

 

8. Summarize the results of a one–sample t test in APA format.

 

9. Compute a one–sample t test and identify confidence intervals using SPSS.