Page 81 - Quantitative Data Analysis

Quantitative Data Analysis
Simply Explained Using SPSS

Unit # 5

Dependent t Test

Learning Outcomes

At the end of this unit, readers will be able to:
 Understand and to conduct dependent-samples t-tests.
 Perform a 7-step hypothesis test for two paired group
means using the appropriate formula.

 Distinguish difference between dependent t test and
independent t test.
 Identify when to use dependent t test.
 Perform independent t-test calculation by hand.
 Practically conduct independent t test in SPSS.
 Understand the assumptions for an independent t-test.
 Interpret t test results.

 Write statistical and research conclusion in APA style.

Dependent (Paired) ‘t’-Test

The dependent or paired t-test is used when you have two
observations for the same individual (e.g. pretest and posttest,
control and treatment groups).

• We now have a dependency issue, those that tend to score highly
on the first observation will likely score highly on the second
observation.

The Theory and Applications of Statistical Inferences 65