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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



Answer :

GinnyAnswer

Final answer:

Control groups in experimental investigations ensure treatment effects are accurately measured and interpreted.


Explanation:

Control groups are essential in experimental investigations to ensure that differences between experimental groups are due to the treatment applied rather than other variables. They help eliminate alternate explanations and increase reliability by providing a baseline for comparison. A control group is not exposed to the independent variable, allowing researchers to attribute any differences observed to the manipulated variable.


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