Statistics Scientific Studies?

Dr. Campbell wants to determine if his newly developed study method is effective and will result in higher grades. He divides his 300-student section of Introduction to History into two groups. The first group uses Dr. Campbell’s method to study for the final exam. The other section uses traditional methods of studying. At the end of the term, Dr. Campbell compares the final exam grades. He found that his own new study method worked better and those students earned higher grades.
1. What are the Independent and dependent variable in this example?
2. Who are the control and experimental groups?
3. Is this an experimental design or a correlation design? Why?

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