Systematic sampling is straightforward and low risk, offering better control. However, it may introduce sampling errors and ...

A recent article explained the role of Gas Chromatography-Mass Spectrometry (GC/MS) in the analytics laboratory. The current article focuses on reviewing the technology used for preparing volatile ...

An independent researcher, chartered accountant, lecturer and financial economist, Dr Evans Duah, has underscored the use of a fully automated and randomised sampling process in his nationwide study ...

Survey researchers increasingly recognize that a single survey of the general public can rarely represent the views of small groups of Americans. Such surveys frequently have too few interviews with ...