study is an experiment of an observational study and then identify a major problem with the study The Physicians Health Study

Question

study is an experiment of an observational study and then identify a major problem with the study The Physicians Health Study involved 22 071 male physicians Based on random selections 11 037 of them were treated with aspirin and the other 11 034 were given placebos The study was stopped e because it became clear that aspirin reduced the risk of myocardial infarctions by a substantial amount Determi This is an because the researchers What is a major problem with the study the individuals Con OA This is a convenience sample with voluntary response which has a high chance of leading to bias OB The results apply only to male physicians OC There is no blinding or replication which has a high chance of leading to bias OD The results apply only to individuals with heart disease

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