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How many respondents to a poll are needed, at a minimum, for its results to be accepted as adequate representation of a much larger population?

How many respondents to a poll are needed, at a minimum, for its results to be accepted as adequate representation of a much larger population?

The number of respondents needed for a poll to be accepted as an adequate representation of a much larger population is determined by the margin of error and the level of confidence desired. In general, a larger sample size results in a smaller margin of error and a higher level of confidence.


The sample size required to achieve a specific margin of error and confidence level can be calculated using statistical formulas. However, as a general rule of thumb, a sample size of at least 400 is often considered adequate for a population of around 100,000, with a margin of error of around 5% and a confidence level of around 95%.


It is important to note that the representativeness of a sample also depends on how it is selected. A sample that is not random or is biased in some way may not be representative of the population and may not provide accurate results. Therefore, the method of selecting the sample is also an important factor in determining its representativeness.

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