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

A simple random sample is a subset of a statistical population where each member of the population is equally likely to be ...

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 of water systems for Legionella, Pseudomonas aeruginosa or bacteriological can be somewhat daunting, with thoughts of "do I need to sample," "how to take a sample" and "where should I send ...

Manure has always been a valuable input to agricultural soils in our region. The value of manure has increased significantly in the last few years as the cost of commercial fertilizers has climbed to ...

The SC30H Heated Sample Changer is perfect for samples that are solid or highly viscous at room temperature. With automatic sampling, rinsing, and drying, the SC30H guarantees excellent ...

Dean Garfield, president and CEO, Information Technology Industry Council, Washington, D.C. Kembrew McLeod, associate professor, department of communication ...