Question: Seventh-grade students are randomly divided into two groups. One group is taught math using traditional techniques;the other is taught math using a reform method. After

Seventh-grade students are randomly divided into two groups. One group is taught math using traditional techniques;the other is taught math using a reform method. After 1 year, each group is given an achievement test to compare proficiency?

Determine whether the study depicts an observational study or an experiment.

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