21. The chief funct...
 
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21. The chief function of the control group in an experiment is that it

 

Aamir Ranjha
(@aamir)
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The chief function of the control group in an experiment is that it

  1. allows mathematical relationships to be established.
  2. provides a point of reference against which the behavior of the experimental group can be compared.
  3. balances the experiment to eliminate all extraneous variables.
  4. is not really necessary.

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Answer
2. provides a point of reference against which the behavior of the experimental group can be compared.


   
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