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 ...

Undoubtedly you would be somewhat uncomfortable about using this estimation procedure. But why? It's not that the procedure will yield too low an estimate: If the sample happens, by chance, to consist ...

The sample contains five observations and consists of values $10,000, $100,000, $50,000, $45,000, and $35,000. First, the user needs to create an array called "data" containing these observations ...

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 ...

As Americans await election results, many are looking to the polls for answers. JUMP TO: MARGIN OF ERROR l PHONE/DIGITAL l OUTLIER POLLS Dr. Andy Smith, from the University of New Hampshire Survey ...

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 ...

Serious polling requires careful data collection and careful adjustment. It doesn't mean much to say your poll is a "probability sample" when your nonresponse rate is 90 percent.