In an experiment, the control group receives a placebo and the experimental group receives the active ingredient.

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This is a common design for a controlled experiment, where one group serves as the control group that receives no active treatment (placebo) while the other group receives the actual treatment (active ingredient). This allows researchers to compare the effects of the treatment with the effects of no treatment and helps to ensure that any observed differences between the groups are due to the treatment itself and not other factors.

In an Experiment, the Control Group Receives a Placebo and the Experimental