ⓘ Margin of error. The margin of error is a statistic expressing the amount of random sampling error in the results of a survey. The larger the margin of error, t ..

                                     

ⓘ Margin of error

The margin of error is a statistic expressing the amount of random sampling error in the results of a survey. The larger the margin of error, the less confidence one should have that a poll result would reflect the result of a survey of the entire population. The margin of error will be positive whenever a population is incompletely sampled and the outcome measure has positive variance, which is to say, the measure varies.

The term margin of error is often used in non-survey contexts to indicate observational error in reporting measured quantities.

                                     
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