You need a control group to compare your experimental group to something.
You need a control group and an experimental group.
The control group gives you something to compare the results to.
yes all experiments need to have a control
Because you need a control group.
The control group in an experiment is the group that nothing is done to. The reason why there is a control group in experiments is to compare it with the group that has been tested.
You use a control group to compare the results of the experimental group to. The control group has the "normal" results. After the experiment, you can tell if and what has changed from the control groups results
to elliminate soures of error
the group that does not change in the experiment VIVI :)
The control group is used for exprimenting
A control group is the unaffected group in a science experiment.
control group
He needed a control group. *Apex*