Stratified mean-per-unit sampling is a key tool used by auditors. The popularity of this statistical procedure arises from its unique ability to produce trustworthy ...

Selecting a random sample from a set is simple. But what about selecting a fair random sample from a set of unknown or indeterminate size? That’s where reservoir sampling comes in, and [Sam Rose] has ...

Sampling is a technique in which samples are drawn at random (without any favor or bias). For this, suitable measures or procedures may be laid down and adopted according to the nature and ...

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 ...

Environmental system designers are frequently asked where to position sample points for particle monitoring, whether it is conducted in a clean device (Isolator, RABS, etc.) or a pharmaceutical ...

Separation of molecules is performed using Size Exclusion Chromatography (SEC), which separates molecules based on size as they pass through a porous resin. Widely used for both preparative and ...

When analyzing multiple samples with dynamic light scattering (DLS) technique, chemists often pipette or pour the suspension into a cell, press the ‘Go’ button, and get a perfect answer within a few ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

New research has led to a model that assesses the short- and long-term effects of in-store product sampling on sales of both the products offered on sample and competitive products. In big box stores, ...

Particle analysis is a crucial step in the quality control of bulk materials and is performed in laboratories worldwide. The methods used have usually been established for years and are rarely ...