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Why should you use a control during an experiment? to help maintain order to provide a greater certainty that the observed results are not by chance to keep data to have an interesting experiment that is easily repeated

User Dabeng
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You should use a control because you need to provide a greater certainty that the observed results are not by chance.
User Daniel Quinlan
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To provide a greater certainty that the observed results are not by chance.
User Marwane Ezzaze
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