Question: Determine whether the study depicts an observational study or an experiment. First dash gradeFirst-grade studentsstudents areare randomlyrandomly divideddivided intointo twotwo groups.groups. OneOne groupgroup isis givengiven

Determine whether the study depicts an observational study or an experiment. First dash gradeFirst-grade studentsstudents areare randomlyrandomly divideddivided intointo twotwo groups.groups. OneOne groupgroup isis givengiven aa fruitfruit andand vegetablevegetable forfor lunch;lunch; thethe otherother isis givengiven candycandy forfor lunch.lunch. AfterAfter lunch commalunch, eacheach groupgroup isis givengiven anan attentionattention testtest toto comparecompare hyperactivity.hyperactivity. nothing

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