Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

How do I know if a candidate’s lead is ‘outside the margin of error’? News reports about polling will often say that a candidate’s lead is “outside the margin of error” to indicate that a candidate’s ...

In the second clip, Caitriona Perry, former Washington Correspondent for RTE, Ireland’s public service broadcaster, talked about polling leading up to the 2016 election and the factors that ...