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You are planning to conduct a research project in your ED and are currently working out an appropriate design for your study.

1. List and describe (4) different types of control groups. (4 marks) 4 marks

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2. Complete the following table by providing (2) strengths and (2) limitations of a retrospective study design. (4 marks) 4 marks

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3. Complete the following table regarding observational studies. (4 marks) 4 marks

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