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A researcher wanted to determine whether having a TV in the bedroom is associated with obesity in teenagers. The researcher surveyed 200 teenagers and after

A researcher wanted to determine whether having a TV in the bedroom is associated with obesity in teenagers. The researcher surveyed 200 teenagers and after analysing the results determined that the body mass index (BMI) of teenagers with a TV in the bedroom was significantly higher than those who did not. Is this an observational study or a designed experiment? Justify your decision.

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