1.explain the benefit of randomization and which study design itapplies to
2. what is the biggest problem with cross-sectionalstudies?
3. which is the only type of study in which the researcherdecides who gets the exposure? why cant we always use thesestudies?
4. explain recall bias and provide an example of a study thatmight have this
5. explain misclassification and how it affects the 2X2table
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