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Audio 1. NPR Poll Finds 2012 Presidential Race Too Close to Call
Discussion of the margin of error in election polls.
Web 1. United Nations
Website of the United Nations which provides statistics on global population, health, and so on.
Web 2. National Center for Health Statistics
Website of the National Center for Health Statistics which provides vital statistics and health information.
Web 3. Office for Human Research Protections
Website of the Office for Human Research Protections, Department of Health and Human Services which provides information on human subjects review boards, requirements, and applications for universities and other agencies.