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Social Studies, 22.04.2020 00:51 cleef6451

Indicate whether the study is an observational study or a controlled experiment. A researcher was interested in the effects of exercise on academic performance in elementary school children. She went to the recess area of an elementary school and identified some students who were exercising vigorously and some who were not. The researcher then compared the grades of the exercisers with the grades of those who did not exercise.

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Indicate whether the study is an observational study or a controlled experiment. A researcher was in...
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