When you set up an experiment, you have to have one set up where you introduce the independent variable (the experimental set up) and one where you do not (the control). ... The two groups are treated EXACTLY alike except for the ONE variable being tested.Explanation: hope it helps
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Answer:
When you set up an experiment, you have to have one set up where you introduce the independent variable (the experimental set up) and one where you do not (the control). ... The two groups are treated EXACTLY alike except for the ONE variable being tested.Explanation: hope it helps