Dependent samples are paired measurements for one set of items. … If the values in one sample affect the values in the other sample, then the samples are dependent. If the values in one sample reveal no information about those of the other sample, then the samples are independent.

What is independent and dependent t-test?

Assumptions in independent samples t-test:1. 2. Assumes that the variance of the two groups are the same as the dependent variable. … In independent sample t-test, all observations must be independent of each other. 6. In independent sample t-test, dependent variables must be measured on an interval or ratio scale.

When should a dependent samples t-test be used?

The dependent sample t-test is used when the observations or cases in one sample are linked with the cases in the other sample. This is typically the case when repeated measures are taken, or when analyzing similar units or comparable specimen.