What is a dependent samples t-test or a paired samples t-test?
One of the most common statistical test, a dependent samples t-test, or a paired samples t-test, is used to find significant mean differences between two groups on a particular measure like SAT scores, ACT scores, GPA, height, or weight. In the case of the dependent samples t-test or a paired samples t-test, the groups of interest are related somehow as siblings or in the environment of a pretreatment vs. posttreatment setting. Either way, the two groups being compared are related somehow. Get help with dependent samples t-test
What is the difference between a dependent samples t-test or a paired samples t-test and an independent samples t-test?
Both tests are used to find significant differences between groups, but the independent samples t-test assumes the groups are not related to each other, while the dependent samples t-test or paired samples t-test assumes the groups are related to each other.
If you're familiar with the tests, a dependent samples t-test or paired samples t-test would be used to find differences within groups, while the independent samples t-test would be used to find differences between groups. Get help with dependent samples t-tests or independent samples t-tests
In a dependent samples t-test or a paired samples t-test, what is the independent variable and what is the dependent variable?
The independent variable and the dependent variable is the same in both the dependent samples t-test and the independent samples t-test. The variable of measure of the variable of interest is the dependent variable and the grouping variable is the independent variable. Get help with dependent samples t-test
Example of dependent samples t-test or a paired samples t-test
The most common use of the dependent samples t-test is in a pretreatment vs. posttreatment scenario where the researcher wants to test the effectiveness of a treatment.
- The participants are tested pretreatment, to establish some kind of a baseline measure
- The participants are then exposed to some kind of treatment
- The participants are then tested posttreatment, for the purposes of comparison with the pretreatment scores