The Future of Opinion Polls: A Conversation with Mark Pack
New Books in Science, Technology, and Society
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What Are the Problems of Waiting?
It's very hard to get a properly random sample because, for example, some people are more willing to take part in poles than others. So what polsters therefore do is they look at the results they've got of who they have managed to speak to and then wait their results to make the results proper representative of the overall group. But one of the problems polsters can run into, and they do from time to time, is that their adjustments end up not being right. Maybe demographic information isn't fully up to date, or maybe there's some criteria which they didn't use to weight by, but which has suddenly become important. And therefore they're caught out by not having waited for
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