Why is it important to have a control group in an experiment?

Why is it important than an experiment include a control group?

  • Answer:

    Depending on the experiment, expectation can be very powerful. In a medical experiment, a control group can help determine whether the drug being tested is responsible for the result rather than expectation or something else. For a study of a rare occurrence, a control group may help an experimenter determine whether the outcome is due to chance.

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