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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
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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

User Taksofan
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To compare the results when the independent variable is not involved
User Jasonaburton
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