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(CORRECT ANSWER) MATH225N Week 8 Final Exam : A farmer divided his piece of land into 4 equivalent groups.

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QUESTION 19

A farmer divided his piece of land into 4 equivalent groups. The quality of the soil is the same across the 4 groups of land. He planted the same crop in all 4 groups of land and recorded the yield of the crop in all 4 groups for a 4 week period. Is the study observational or experimental? If it is an experiment, what is the controlled factor?

Select the correct answer below:

The study is an observational study.

The study is an experiment. The controlled factor is the 4 week observation period.

The study is an experiment. The controlled factor is the land.

The study is an experiment. The controlled factor is the growth of the crops.

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