I need the definition to this word(control group). If anyone can help, it would be appreciated.|||A control group is the group in an experiment that you do not change.
A sample in which a factor whose effect is being estimated is absent or is held constant, in order to provide a comparison.
untreated subjects used as test benchmark: in an experiment, the group of test subjects left untreated or unexposed to some procedure and then compared with treated subjects in order to validate the results of the test
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