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

A. To show what happens when the dependent variable is not changed.
B. To see how the dependent variable changes the independent variable.
C. To compare the results when the independent variable is not involved.
D. To allow the researchers to change the dependent variable as they wish.

Sagot :

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Final answer:

A control group in an experimental investigation is crucial for isolating the effects of the independent variable from other factors.


Explanation:

In an experimental investigation, a control group is vital for ensuring that any differences observed between experimental groups are due to the treatment being tested, rather than other factors. The control group is a sample that is not exposed to the independent variable but is treated the same in all other aspects. By comparing the results of the control group with the experimental group, researchers can attribute any variations to the hypothesized manipulation.


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