mullery5171 mullery5171
  • 10-01-2024
  • Health
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A doctor claims to be able to cure migraine headaches. A researcher administers a questionnaire to each of the patients the doctor claims to have cured. Is this study a survey, an experiment, an observational study, or a case study?
1) Survey
2) Experiment
3) Observational study
4) Case study

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