Why do you need a control group and a experimental group?

Answer 1

A control group is not provided any treatment, while the experimental group is the one to which a treatment is applied.

The control and experimental groups are chosen to be as similar as possible, so that the observed effect (if any) can be attributed to the variable: what only the experimental group consumes, uses, or participates in.

Answer 2

You test a control group to see what effect the experiment itself has on the participants. The tests must be arranged so that the control group and the experimental group are both going through all the same tests and being given the same information. If you were testing a medication, you would give the control groups placebos. In an ideal experiment not even the testers doing the experiment know who receives the drugs until testing is complete.

To get the right results and avoid getting false-positive results.

Answer 3

Because they need to compare the experimental groups with something.

They have the experimental group in which they experiment on and the control group in which they don't experiment. After they finish experimenting with the experiment group they compare it with the control groups to check what changed and what has been altered between these 2 groups.

Answer 4

A control group is used to show exactly what happens in normal circumstances. The experiment group is the one that is actually tested, then compared to the results of the control group to see what difference if any there is in the results.

Answer 5

A control group allows researchers to compare results with a baseline, while an experimental group receives the treatment being tested. Comparing these two groups helps determine the effect of the treatment, minimizing bias and ensuring that any observed changes are due to the treatment itself.