This webpage discusses principles and guidelines for selecting probability sampling designs in research studies.

In equal probability sampling, each unit in the sampling frame, or in a stratum, has the same probability of being selected for the sample. PROC SURVEYSELECT provides the following methods that select ...

Among them, this article focuses on the latest cases of European countries that attempt to shift their survey methods based on probability sampling from conventional ones such as face-to-face ...

Bart Buelens, Joep Burger, Jan A. van den Brakel, Comparing Inference Methods for Non-probability Samples, International Statistical Review / Revue Internationale de Statistique, Vol. 86, No. 2 ...

You can't do this with non-probability sampling methods. 2. Discuss the main types of probability sampling methods and explain their strengths and weaknesses. If you construct your sample by randomly ...

Why do pollsters make such a big deal about probability sampling? You'd think that choosing people to interview should be easy. Take three of these, four of those, and two of the other. But it's ...

The survey was conducted using GfK Knowledge Networks’ KnowledgePanel, an online nationally representative panel of households recruited through probability-based (random) sampling methods. More ...

Until we have more organizations conducting polls in advance of elections and explaining their methods in detail, I believe that adoption of non-probability sampling for political polling will proceed ...