Epidemiological methods of research

What is the fundamental difference between the method you have chosen (either the case-control or cohort method) and the randomized controlled trial?
What are the advantages and disadvantages of the study method you chose (case-control or cohort study)?
What are the characteristics of a correlational study?
Where does the method you chose (case-control or cohort study) fall on the research pyramid? What does where it is on the research pyramid mean?

Sample Solution