What does a control group show in an experimental investigation?
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Answer:
A control group in a scientific experiment is a group separated from the rest of the experiment, where the independent variable being tested cannot influence the results. This isolates the independent variable's effects on the experiment and can help rule out alternative explanations of the experimental results.
Researchers can confirm that study outcomes are due to modification of independent factors rather than extraneous variables when control groups are present.
Experimental research is devising a "fair test" in which elements are proactively manipulated, controlled, and quantified in order to gather data to support or deny a causal relationship. There is a control group in experimental studies which does not undergo any treatment. True experimental designs require the use of control groups as a very important aspect of the experiment performed.