Question: A study is designed to test the effect of light level on exam performance of students. One exam room is outfitted with overhead fluorescent lights

A study is designed to test the effect of light level on exam performance of students. One exam room is outfitted with overhead fluorescent lights (the control) and the other exam room is outfitted with individual desk lamps (the treatment). Students are randomly assigned to take the exam in one of the two rooms and their scores on the final (from 0 - 100) are recorded. Question 3.1 Q3.120 Points Grading comment: What statistic could serve as a good estimate of the average treatment effect? Choice 1 of 4:The total average score on the exam. Choice 2 of 4:The overall proportion of students who passed the exam. Choice 3 of 4:The difference in the proportion of students assigned to the each room. Choice 4 of 4:The difference in the average exam score of the students in the control room and the average exam score of the students in the treatment room

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