A sample of 504 patients in early stages of Alzheimers disease is divided into two groups. One
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A sample of 504 patients in early stages of Alzheimer’s disease is divided into two groups. One group receives an experimental drug; the other receives a placebo. The advance of the disease in the patients from the two groups is tracked at 1-month intervals over the next year?
Determine whether the study depicts an observational study or a designed experiment.
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This is an experiment because ...View the full answer
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Muhammad Salman Alvi
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