does every experiment need a control group

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1. Experiment process for Control group and experiment group

   

2. Solved 1) Why is it important that an experiment include a

   

3. Solved The purpose of a control group in an experiment

   

4. Control Group Examples

   

5. Solved 5. Explain the purpose of a having a control group in

   

6. Control Group in Science: Understanding the Basics and Benefits