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?

Question

Business

Cullen Buck

29 March, 14:04

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?

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Answers (2)

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Abram Kramer · Answer 1

The controlled factor is the land

Explanation:

The study is an experiment. The controlled factor is the land because the quality of the soil is the same across the 4 groups of land.

Ayala · Answer 2

1. It is an experimental study

2. The controlled factor is the quality of the soil

Explanation:

1. It is an experimental study because the farmer is setting some initial conditions for the growing of the crop, if instead he was just recording the yield of a previous crop in which he didn't controlled any factor it would be an observational study.

Also we can say it is an experimental study because he has set an experimental design in which he controls the quality of the soil, and his method for gaining the information consist on recording the yield of the crop in 4 groups for 4 weeks, in this way he establish 4 repetitions in a 4 weeks period of time.

2. The controlled factor is the quality of the soil because it is a condition stablished before the experiment initiate and it is the same for all the study groups.