public surveys What is a margin of error? This statistical tool can help you understand vaccine trials and political polling Jan 11, 2021 9:46 AM PHT The Conversation INFO ...

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.

Andrew Gelman, a professor in the departments of statistics and political science at Columbia University, explains. A "3 percent margin of error" means that there is a 95 percent chance that the ...