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Frequently asked questions
Frequently asked questions (FAQ)
What is the Public Opinion Research Centre and how is its research funded?
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How accurate are survey estimates? Sampling error and non-sampling error
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How does the Public Opinion Research Centre select respondents?
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Is 1000 respondents enough?
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Why are data sometimes weighted?
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What do we have to be careful about when interpreting the results of public opinion research?
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What are party preferences, voter preferences, and likely voter model?
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Does the likely voter model predict the results of an election?
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How accurate are survey estimates? Sampling error and non-sampling error
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