Question: A researcher wanted to know if using regular fertilizer or organic fertilizer will affect the yield of potatoes. He divided a large parcel of land

A researcher wanted to know if using regular fertilizer or organic fertilizer will affect the yield of potatoes. He divided a large parcel of land into 10 small parcels and then randomly selected five parcels to grow potatoes using regular fertilizer and the other five parcels using organic fertilizer. Is this an observational study or a randomized experiment?

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