In order to answer the given question, which of the following types of study would be the most appropriate: an experiment without blinding, an experiment with single blinding, an experiment with double blinding, an observational study, or a case-control study?What percentage of the population reads a newspaper on a regular basis?
A. Observational study
B. Case-control study
C. Experiment without blinding
D. Experiment with double blinding
E. Experiment with single blinding
Answer: A
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