Is it necessary to have a control group in an experiment?

You need a control group when completing a research experiment to focus on the change variable. An experiment is all about observing change in a variable. The important task prior to conducting an experiment is to eliminate all variables, but the one being tested.

In respect to this, why is it necessary to have a control group in an experiment?

A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable. This increases the reliability of the results, often through a comparison between control measurements and the other measurements.

What is the purpose of a control group in an experiment?

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.

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