Shani is testing whether her intervention designed to increase self-reported tolerance for others in aggressive youth is effective. She administers her scale before and after the intervention and concludes that her intervention is effective. Which analysis did Shani most likely use?
A) The t test for independent samples
B) The t test for nonindependent samples
C) ANCOVA
D) ANOVA

Question

Quizplus · Accepted Answer

Shani used the t test for nonindependent samples, also known as the paired samples t test. This is because she administered the same scale twice to the same group of people before and after the intervention, making the samples related or dependent on each other. The paired samples t test is appropriate for analyzing the mean differences between two related groups.

Shani Is Testing Whether Her Intervention Designed to Increase Self-Reported