Mary Hall is a editor for Investopedia's Advisor Insights, in addition to being the editor of several books and doctoral papers. Mary received her bachelor's in English from Kent State University with ...

A research team has extended the capabilities a a novel microfluidic lab-on-a-chip system for analyzing the chemical components of complex biological samples. It's not often that someone can claim ...

Any plant, biological, petrochemical or environmental sample can be considered to be a complex sample. By definition, a complex sample is a multicomponent sample that contains a wide variety of ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Representative sampling and random sampling ...