It ain't a shy Trump thing if Susan Collins is beating her polls by a ton... That is, the problem doesn't seem to be Trump specific...
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But to judge the extent of the polling errors we really got to wait until vote counts are more complete. I'll leave you with a scary thought: I'm not sure any individual poll average miss in a swing state was outside the 95% confidence interval for state polling.
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Replying to @zeynep @ForecasterEnten
Huh? You can have confidence intervals even without the central limit theorem applying. Certainly for even the smallest samples. You just need to use the correct formulation rather than assume normality.
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Replying to @arikmotskin @ForecasterEnten
Yes, but for polling data. That's not what we're doing here. (I meant it only for what the 95 percent confidence intervals are for these polls.)
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Replying to @zeynep @ForecasterEnten
I think it's fair to say that if there is a systematic bias, then traditional ways of computing CIs are meaningless or misleading. But that's separate from the central limit theorem
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Do you know any pollsters adjusting their CI calculations? I usually read the appendices and have not seen anything different.
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