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 ...

Two approaches to estimating a finite population mean from unequal probability samples are contrasted. In the prediction approach a model is specified for the population values and is used to predict ...

Q. On “news” sites, one reads daily that “43% surveyed think this,” or “72% of …. name the group” are doing this. Yet, when one performs due diligence, the statistic recedes into non-importance, ...