Networks are a popular tool for representing elements in a system and their interconnectedness. Many observed networks can be viewed as only samples of some true underlying network. Such is frequently ...

Learn the distinctions between simple and stratified random sampling. Understand how researchers use these methods to accurately represent data populations.

We’ve done product sampling for a number of clients, and it’s a very effective way to influence buying behavior for a brand. An Arbitron* study indicates that 2/3 of people will take a free sample ...