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...and samples *can* predict a lot about what is true for populations. If I flip a coin 10 times and count the number of times the coin lands heads up I can make a useful prediction about the number of heads I would expect if I were to flip the coin 100 times or 1000 times or 10,000 times.
Also, note that the number of people polled in swing states (about 2000) is about twice as many as in non-swing states (about 1000 people). National opinion polls (Harris, Zogby, NYT) usually have a few hundred randomly selected people -- these have thousand(s).
Just a thought --
:eyes:
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