Probability sample in social science research is a sample drawn from a population using methods which ensure random selection. In Probability sample, each member of the population must have an equal probability of being drawn.

Probability and sampling - J S Bulman & J F Osborn -
British Dental Journal 166, 132 - 135 (1989)

The concept of probability is introduced, and the role of probability distributions in
statistical theory is discussed, with particular reference to the Normal distribution and
its characteristics.

**Probability Sample Designs that Impose Models on
Survey Data** - Stephen Woodruff

Abstract: For a substantial class of sampling problems, the sample design and the
characteristics of the population being sampled, not only provide the probabilities of
selection but also impose a regression model on the sample data.

**Survey non-response in a national area
probability sample as a dimension of survey quality; an analysis of community
characteristics** - Kim, Jibum. and Sokolowski, John

Abstract: Most area probability surveys collect little to no information about
non-respondents. This paper aims to explore the community characteristics of survey
non-respondents in a nation area probability survey. Data selected for use is obtained
from the 2004 General Social Survey, an area probability sample of 6260 housing units.

Results from the survey are nationally representative of English speaking residents. We expect that wealthy and racially segregated areas are more likely to have high non-response rates. This paper examines community characteristics in relation to survey non-response and proposes ways to improve response rates among high non-response communities in national area probability sample surveys.