When is a case-control study design typically used in epidemiological research?Select one alternative:When researchers know the exposure but not who is sick or healthy.When researchers know who is sick and who is healthy, but do not know the exposure.When researchers know both the exposure and the health status of individuals.When researchers randomly assign participants to control and experimental groups.

When should a researcher consider using a case-control study? Select all that apply. When exposure data are expensive or difficult to obtain When the disease is well-understood When the disease has a long induction and latent period When the disease is common

True or False: Case-control studies use a strategy that identifies health outcome status initially and then determines exposures of the study population.TrueFalse

Case control studies are:Question 4Select one:a.Always at risk of attrition biasb.Always retrospective and observationalc.Always considered to be experimental by designd.Always prospective, with the investigator looking forward in time

True or False: Case-control studies can directly measure the risk or rate of a health outcome?TrueFalse

Epidemiology is:Group of answer choicesThe study of how people manage issues of health and illness, disease and disorder, and healthcare for both the sick and the healthyThe study of the social process that normalizes "sick" behaviorThe study of the process that changes "bad" behavior into "sick" behaviorThe study of the incidence, distribution, and possible control of diseases