Include answers for part A and B. A scientist wants to test the effect of consuming caffeine on college biology exam scores. The test subjects are all RCC Bio-1 students who have the same professor, use the same exam preparation techniques, and study for the same amount of time before the exam. One group of students drinks a large regular coffee 30 minutes before the exam and the other group drinks a large decaf (neither group knows whether they got regular coffee or decaf). The average exam scores of the two groups were then compared to see if caffeine has an effect on the students' grades. A. What is the dependent variable in this study? B. What is the independent variable in this study?
Added by Miguel -Ngel J.
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In this case, it is the exam scores of the students. The independent variable is the variable that is manipulated or controlled by the researcher. In this case, it is the type of coffee (regular or decaf) consumed by the students. So, the answers are: Show more…
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