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Stratified random sampling is a method of sampling that divides a population into smaller groups that form the basis of test samples.

NASA’s OSIRIS-REx spacecraft will make its first attempt to collect a sample from asteroid Bennu on Oct. 20. Dante Lauretta, OSIRIS-REx principal investigator and a professor of planetary science and ...

NASA's Perseverance Mars rover is preparing to collect its first-ever sample. The agency's Southern California-based Jet Propulsion Laboratory (JPL) said that the rover was searching for a ...

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, ...

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A model looked at the numbers associated with detecting and containing a potential African swine fever virus (ASFV) outbreak in the U.S. and found that sampling and laboratory capacity are areas of ...