The margin of error is how far a result might be from the true value. A margin of error of three points, within the margin of error, quote the margin of error.
A poll lead smaller than the margin of error is not a lead at all, which reporters forget every election. It shrinks as the sample grows, but only slowly, so doubling the accuracy costs four times the work.
1nounmargin of errorHow far a result might be from the true value.
“The two candidates are level once you allow for the margin of error.”
margin of error is a measure.
Practised in Academic English