An Experiment Is Being Conducted to Determine the Effects of Caffeine

question 55

Multiple Choice

An experiment is being conducted to determine the effects of caffeine intake on student performance.One group is made to drink 5 cups of coffee, the other group drinks 1 cup of coffee.They then take the exam.The independent variable is ______.

• A)the amount of caffeine consumed
• B)how alert the students are during the exam
• C)the group membership
• D)the students' performance on the exam

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