Fehlerintervall

Fehlerintervall, also known as margin of error, is a statistical term that represents the amount of random sampling error in the results of a survey or poll. It quantifies the uncertainty around an estimate, indicating the range within which the true population value is likely to lie. The Fehlerintervall is typically expressed as a plus or minus percentage. For example, if a poll shows a candidate with 50% support and a Fehlerintervall of +/- 3%, it means that the true support for the candidate in the population is likely between 47% and 53%.

The size of the Fehlerintervall depends on several factors, including the confidence level and the sample size. A higher confidence level, which indicates a greater certainty that the true value falls within the interval, will result in a wider Fehlerintervall. Conversely, a larger sample size generally leads to a smaller Fehlerintervall, as it provides more information about the population and reduces the impact of random chance.

It is important to understand that the Fehlerintervall only accounts for random sampling error. It does not account for other potential sources of error, such as non-response bias, measurement error, or errors in data processing. Therefore, while a small Fehlerintervall suggests a more precise estimate, it does not guarantee that the estimate is completely accurate. When interpreting survey results, considering both the Fehlerintervall and potential non-sampling errors is crucial for a comprehensive understanding of the data's reliability.