![]() For example, you could use a paired t-test to understand whether there was a difference in managers' salaries before and after undertaking a PhD (i.e., your dependent variable would be "salary", and your two related groups would be the two different "time points" that is, salaries "before" and "after" undertaking the PhD). The paired t-test, also referred to as the paired-samples t-test or dependent t-test, is used to determine whether the mean of a dependent variable (e.g., weight, anxiety level, salary, reaction time, etc.) is the same in two related groups (e.g., two groups of participants that are measured at two different "time points" or who undergo two different "conditions").
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