Word: bias
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Dates: during 2000-2009
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...have more breast-feeding and reduced rates of postpartum depression." Cheyney acknowledges that the kinds of mothers who choose midwifery might be the very kinds who would be less inclined to suffer postpartum depression or nursing problems in the first place, and her study addressed such so-called sampling bias...
...mass destruction in Iraq to funding for No Child Left Behind - it was that she was blaming the CIA itself. Even through the WMD contortions, Dems only ever accused the Administration of manipulating CIA intelligence to its own ends. Pelosi is effectively accusing the agency of a dangerous bias - an indictment it cannot directly answer without revealing secret information...
...impressive 1,700 responses, 62% of which favored official recognition of ROTC at the College. Yet the HRC’s claim that the poll shows “strong support for official recognition of ROTC among Harvard students” is dubious at best. A substantial self-selection bias and a low response rate show that this poll can tell us very little about opinions towards ROTC on campus. The discussion it has provoked, however, is a sign of the issue’s importance on campus, and the conversation on this policy should continue with more representative polling...
This poll’s various flaws make it a highly inaccurate barometer of the opinions of the student body. The nature of the poll, in which students were emailed a link and given the option to respond, lends itself to a self-selection bias. Only the students interested in answering the email, and if so, the specific questions presented in the poll, would participate in the exercise. Therefore, since there is a clear and significant difference between the population that selected into the survey and that which did not, any claim that the views of the 26 percent...
...opinion more nuanced than a simple “yes” or “no” would have difficulty express his or her opinion on such a complex issue, given the phrasing of the question. The HRC has acknowledged the existence of a self-selection bias, but still claims that its poll demonstrates that “student opinion” is “at odds with Faculty opinion” on the ROTC question. This is certainly not the case when the poll in question is sent out online, offers a narrow range of survey...