A researcher wanted to study if regular exercise can control diabetes. He took a sample of 1200
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A researcher wanted to study if regular exercise can control diabetes. He took a sample of 1200 adults who were under treatment for diabetes. He asked them if they exercise regularly or not and whether their diabetes was under control or not. Based on this information he reached his conclusion that regular exercise can keep diabetes under control. Is this an observational study or a designed experiment?
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