sampling

/sam"pling, sahm"/, n.1. the act or process of selecting a sample for testing, analyzing, etc.2. the sample so selected.[163040; SAMPLE + ING^{1}]
* * *
in statistics, a process or method of drawing a representative group of individuals or cases from a particular population. Sampling and statistical inference (inference) are used in circumstances in which it is impractical to obtain information from every member of the population, as in biological or chemical analysis, industrial quality control, or social surveys. The basic sampling design is simple random sampling, based on probability theory. In this form of random sampling, every element of the population being sampled has an equal probability of being selected. In a random sample of a class of 50 students, for example, each student has the same probability, 1/50, of being selected. Every combination of elements drawn from the population also has an equal probability of being selected. Sampling based on probability theory allows the investigator to determine the likelihood that statistical findings are the result of chance. More commonly used methods, refinements of this basic idea, are stratified sampling (in which the population is divided into classes and simple random samples are drawn from each class), cluster sampling (in which the unit of the sample is a group, such as a household), and systematic sampling (samples taken by any system other than random choice, such as every 10th name on a list).An alternative to probability sampling is judgment sampling, in which selection is based on the judgment of the researcher and there is an unknown probability of inclusion in the sample for any given case. Probability methods are usually preferred because they avoid selection bias and make it possible to estimate sampling error (the difference between the measure obtained from the sample and that of the whole population from which the sample was drawn).* * *
Universalium. 2010.
Look at other dictionaries:
Sampling — sampling … Dictionary of sociology
sampling — samp‧ling [ˈsɑːmplɪŋ ǁ ˈsæm ] noun [countable, uncountable] STATISTICS the activity of checking a small number of products from a larger number, asking questions to people from a larger number etc, so as to understand better the group as a whole … Financial and business terms
Sampling — may refer to: Sampling (signal processing), converting a continuous signal into a discrete signal Sampling (graphics), converting continuous colors into discrete color components Sampling (music), re using portions of sound recordings in a piece… … Wikipedia
Sampling — (engl. sample: „Stichprobe“, „Auswahl“) steht für: eine Probenahme, die Entnahme einer Stichprobe, um repräsentative Fakten über die Zusammensetzung einer Menge erhalten zu können eine Maßnahme der Verkaufsförderung, bei der eine Warenprobe meist … Deutsch Wikipedia
sampling — ● sampling nom masculin (anglais, sampling, échantillonnage) Musique Échantillonnage … Encyclopédie Universelle
Sampling — provision of a sample of the object of conformity assessment, according to a procedure (p. 4.1 ISO/IEC 17000:2004). Источник … Словарьсправочник терминов нормативнотехнической документации
sampling — [sam′pliŋ, säm′pliŋ] n. 1. the act or process of taking a small part or quantity of something as a sample for testing or analysis 2. the sample so taken 3. the practice or process of taking a SAMPLE (n. 3) and reusing it in another context … English World dictionary
Sampling — Sampling auch: Sampling 〈[sa:mplıŋ] n. 15; unz.; Mus.〉 1. das Sampeln 2. Aufnahmetechnik, bei der verschiedene Tonquellen wie z. B. Musikstücke, Alltagslärm, Kommentare usw. mittels eines Mischpultes auf einem Tonband zusammengeführt u. zu… … UniversalLexikon
sampling — A method for collecting information and drawing inferences about a larger population or universe, from the analysis of only part thereof, the sample. Censuses of the population are an expensive way of monitoring social and economic change, and… … Dictionary of sociology
sampling — 1. Mktg a sales promotion technique in which customers and prospects are offered a free sample of a product 2. Ops the selection of a small proportion of a set of items being studied, from which valid inferences about the whole set or population… … The ultimate business dictionary