Paired and Independent t-test

The t-test is a frequently used statistical procedure that compares the means of two groups. There are two versions of the test based on whether the two groups are matched or not matched. Matched groups (also known as paired groups or samples) share many common characteristics, whereas unmatched groups (or independent groups or samples) do not. You must be able to identify which version of the t-test should be used in a given situation. This week’s Discussion focuses on helping you identify the version to use based on the type of groups you want to compare.

To prepare for this Discussion, review this week’s Media and readings in Chapter 6 of the course text. Focus on the discussion of the difference between matched (paired) and independent samples. Then, review the Table of Variables document in the Learning Resources section. Think about how you would analyze the data using a t-test.

Then write the example of how to use a t-test to analyze the data from the Table of Variables in the Learning Resources. Then, list the grouping variable and continuous variable that you would include in the analysis. Finally, state which t-test you would use in your analysis and why that is the most appropriate

• Readings

Document: Table of Variables

You will use this table as part of this week’s Discussion.

PowerPoint: t-Tests: Measuring the Difference between Group Means

Document: Step-by-Step Guide to Week 5, Problem 5.1a and 5.1b

Document: Step-by-Step Guide to Week 5, Problem 5.2

Step-by-Step Guide to Week 5: Problem 5.1a and 5.1b (Word document), and the Step-by-Step Guide to Week 5: Problem 5.2 (Word document).