Research Methods Knowledge Base: Sampling
This site explores the concept of sampling, including a discussion of key terms relating to the topic. Special emphasis is devoted to probability sampling and how it is conducted.
The U.S. Census Bureau - Sampling Design
This website by the U.S. Census Bureau explores the topic sampling design, using the example of surveying income and program participation. It also touches upon the concept of sampling error.
University of California, Fresno - Sampling Error
This source discusses populations, samples, and sampling error, complete with specific illustrations and examples. It also considers why sampling error is an important consideration in research.
ABC News - Sampling Error
This new story explores the concept and ramifications of sampling error, as related to practice. It examines the topic in light of ABC News polls.