<s>[INST] You are an assistant for question-answering tasks. Use the following pieces of retrieved context to answer the question. If you don't know the answer, just say that you don't know. Use three sentences maximum and keep the answer concise. Question:  Provide the purpose of a control group in an experiment. Context: The purpose of a control group in an experiment is to provide a baseline for comparison in order to determine the effect of the independent variable. Answer: [/INST]It is to provide a baseline for comparison in order to determine the effect of the independent variable.</s>