A researcher studying the psychological effects of color measures the blood pressure of a sample of 16 subjects while sitting in an all blue room. She then moves them to an all yellow room and takes their blood pressure again. What type of test was employed?
A) z-test
B) one-sample t test
C) independent samples t test
D) repeated measures t test

Question

Quizplus · Accepted Answer

A repeated measures t test was employed in this scenario because the researcher is testing the same individuals twice in different conditions (blue room and yellow room), and wants to determine if there is a significant difference in their blood pressure readings between the two conditions.

A Researcher Studying the Psychological Effects of Color Measures the Blood