ibe Maps by grade). Suppose he is able to get his statistics class to participate in an experiment: the class will be randomly divided into four study groups. Each group will meet up twice a week after school to study for an upcoming test for one hour. . One group will consume one serving of caffeinated tea or coffee at the beginning of the study session. . One group will consume 2 servings of caffeinated tea or coffee at the beginning of the study session. . One group will consume 1 serving of decaffeinated tea or coffee, but will not be told it is decaffeinated. . One group will only drink water. The teacher will then compare the test grade to the student's current grade in the class and will calculate a percentage increase/decrease for each student. Suppose further that the teacher has agreed to curve the test grade for the lower-performing group if the class can prove that there is a statistical difference in academic performance. i. The response variable is: [ Select ] ii. Another name for the response variable is: [ Select ] iii. The explanatory variable is: [ Select ] iv. Another name for the explanatory variable is: [ Select ] V. A confounding variable in this experiment is: [ Select ] vi. The control group is: [ Select ] vii. The placebo group is: [ Select ]