What is the Margin of Sampling Error?
The margin of sampling error is the price you pay for not talking to everyone in your population group. It describes the range that the answer likely falls between if we had talked to everyone instead of just a sample. (There is no such thing as a measurable margin of error for a poll -- polls are subject to other errors, ranging from how well the questions were designed and asked to how well the interview was conducted. Good pollsters and researchers do everything in their power to minimize these other possible sources of errors, but they are non-measurable, and one can never know the precise amount of error associated with any poll finding.) Continue reading....
- A Guide to Sample Size and Margin of Error -- Public Agenda
- "How Poll Sampling Works" - Online Journalism Review
- Sample Size Calculator
- CBS News Polling Director on Sampling
- ABC News Polling Director on Margin of Sampling Error
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