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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 »
Don't Take Yearly Census Estimates Too Seriously
Submitted by MLewyn on Fri, 08/16/2013 - 2:07pmEvery year, the Census comes out with estimates of county population. Because the 2011-12 estimates showed big gains for most urban counties, urbanists were happy to declare victory, and to claim that these estimates showed a movement of population back to cities. In other years, Census ... read more »