Evaluators can use a t-test to determine whether a variable changed significantly in one group at two points in time.

Name: Evaluators can use a t-test to determine whether a variable changed significantly in one group at two points in time.
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A t-test, specifically a paired sample t-test, is used to compare the means of a single group at two different times, determining if there has been a significant change in the variable of interest.

Evaluators Can Use a T-Test to Determine Whether a Variable