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5 September, 07:01

The purpose of the control group is to

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  1. 5 September, 07:21
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    Have everything in control and in order and discuss about different issues.
  2. 5 September, 07:24
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    A researcher must only measure one variable at a time, and using a scientific control group gives reliable baseline data to compare their results with. For example, a medical study will use two groups, giving one set of patients the real medicine and the other a placebo, in order to rule out the placebo effect.
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