A measure of the uncertainty in an estimate of a parameter;. The margin of error of an estimate is typically one or two times the estimated standard error of the estimate.

an index indicating the amount beyond the minimum necessary; "in engineering the margin of safety is the strength of the material minus the anticipated stress"

Also confidence interval. In the conclusion to an inductive generalization, the range of frequencies within which the property is stated to occur.

A measurement of the accuracy of the results of a survey. Example: A margin of error of plus or minus 3.5% means that there is a 95% chance that the responses of the target population as a whole would fall somewhere between 3.5% more or 3.5% less than the responses of the sample (a 7% spread). However, for any specific question, the margin of error could be greater or less than plus or minus 3.5%.

Statistical formula that allows for the calculation of the level of precision of survey results. The margin of error accounts only for errors associated with sampling.

A range of numbers used to determine the confidence interval, usually expressed as "plus or minus and x %". Note that the margin of error is computed on sample size and is only valid if the poll was well designed and executed on a true random sample. A poll with misleading questions will produce misleading results.

A margin of error is the difference between an estimate and its upper or lower confidence bounds. Confidence bounds can be created by adding the margin of error to the estimate (for an upper bound) and subtracting the margin of error from the estimate (for a lower bound). All published margins of error for the American Community Survey are based on a 90 percent confidence level. Related terms: Confidence interval (American Community Survey), Lower bound (American Community Survey), Upper bound (American Community Survey)

The margin of error is a statistic that expresses the amount of random error in a survey's results. It is a measure of the variation one would see in reported percentages if the same poll could be taken multiple times with different samples. The larger the margin of error, the less confidence one has that the poll's reported percentages are close to the "true" percentages, that is the percentages in the whole population.

"Margin of Error" is the sixth episode of the fourth season of the HBO original series, The Wire. The episode was written by Eric Overmeyer from a story by Eric Overmeyer & Ed Burns and was directed by Dan Attias. It originally aired on October 15, 2006.