Social Studies, 24.02.2020 20:46 NathanaelLopez

Dr. Branch would like to study the relationship between room lighting and college students' test performance. He randomly assigns college students to two groups. The first group takes an exam in a dimly lit room and the second group takes the same exam in a regularly lit room. What is the independent variable?

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Dr. Branch would like to study the relationship between room lighting and college students' test per...