Question: etermine whether an observational study or an experimental study is used. Two groups of grocery shoppers were randomly selected. The individuals in Group shopped at

etermine whether an observational study or an experimental study is used. Two groups of grocery shoppers were randomly selected. The individuals in Group shopped at a health food supermarket. Group individuals shopped at a neighborhood grocery store. At the end of one month, the average food costs of the two groups were compared. Observational Experimental

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