Google says that the margin of error is “The margin of error is a statistic expressing the amount of random sampling error in a survey’s results. The larger the margin of error, the less confidence one should have that the poll’s reported results are close to the “true” figures; that is, the figures for the whole population.”
But how do they know how wrong they are? Is it just bullshit?
In: Mathematics
FYI: when I took statistics, my professor said that you want to look for a sample of ~1,000 in a poll, and a good margin of error is 3%. That’s why you see political commentators lose it when races get within about 5%; that margin of error could reverse an election result.
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