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Why is it important to include a control group?

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2 points
It does not receive the independent variable
It gives you something to compare your other results against
It makes your results more reliable
all of the above

All of the above. Including a control group is important because it allows you to compare the results of the experimental group (which receives the independent variable) to a group that does not receive the independent variable. This helps to ensure that any changes observed in the experimental group are actually due to the independent variable and not some other factor. Additionally, including a control group can make your results more reliable by reducing the likelihood of confounding variables and increasing the internal validity of your study.