From the link:
Quote:
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Results are based on telephone interviews with 1,033 national adults, aged 18 and older, conducted March 26-28, 2010. For results based on the total sample of national adults, one can say with 95% confidence that the maximum margin of sampling error is ±4 percentage points.
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In other words, the long-term goal of these pollsters is to be wrong 5% of the time.
It's good to see that polls are finally including the confidence levels associated with the error.
If the media had a clue about such things, they would have known that the 2000 election problem (calling a state wrong) was likely to happen.
And now the gov't wants to use sampling for the census...
