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Politics : Formerly About Advanced Micro Devices
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To: locogringo who wrote (961681)9/6/2016 11:59:13 AM
From: puborectalis  Read Replies (1) of 1576882
 
If you combine results from multiple polls taken at the same time, you can think of it as one huge poll. That drives down the overall margin of error and can make you more confident in the predictive power of the polls.

In the real world, different polls are conducted in different ways, so you can't think of an aggregated poll as truly one big sample. But this is also a virtue because it reduces the effect of pollster biases and errors. FiveThirtyEight, The New York Times, and RealClearPolitics all run averages with different weightings and methodologies.
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