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The Importance of The Margin of Error
Submitted by MLewyn on Fri, 12/13/2013 - 11:09amEven the best poll or survey is slightly inaccurate, because a poll of a sample of people may not accurately reflect the entire population. To account for this problem, pollsters have developed the concept of a "margin of error"- a number (usually 2 to 5 percentage points) which shows the rang... read more »