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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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.
Transcribed Image Text: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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