In fallout over polls, "margin of error" gets new scrutiny Polling experts are questioning whether the margin of error is a useful metric. Some say it should be banished.

In the last year, statistics have been unusually important in the news. How accurate is the COVID-19 test you or others are using? How do researchers know the effectiveness of new therapeutics for ...

The margin of sampling error is typically calculated with a statistical formula. But the true margin of error for a poll can be twice as large as reported, research has shown.