sampling+sample+selection

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• Sampling (statistics) — Sampling is that part of statistical practice concerned with the selection of individual observations intended to yield some knowledge about a population of concern, especially for the purposes of statistical inference. Each observation measures… …   Wikipedia

• Selection bias — is a statistical bias in which there is an error in choosing the individuals or groups to take part in a scientific study.[1] It is sometimes referred to as the selection effect. The term selection bias most often refers to the distortion of a… …   Wikipedia

• 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 bias — In statistics, sampling bias is when a sample is collected in such a way that some members of the intended population are less likely to be included than others. It results in a biased sample, a non random sample[1] of a population (or non human… …   Wikipedia

• sample preparation — ▪ chemistry Introduction  in analytical chemistry (chemistry), the processes in which a representative piece of material is extracted from a larger amount and readied for analysis. Sampling and sample preparation have a unique meaning and special …   Universalium

• sampling error — The principal aim of any sampling procedure is to obtain a sample which, subject to limitations of size, will reproduce the characteristics of the population being studied, especially those of immediate interest, as closely as possible. In… …   Dictionary of sociology

• sélection aléatoire — atsitiktinė atranka statusas T sritis automatika atitikmenys: angl. random sample; random sampling; random selection vok. Zufallsauswahl, f rus. случайная селекция, f; случайный выбор, m; случайный отбор, m pranc. sélection aléatoire, f …   Automatikos terminų žodynas

• sampling bias — See sample selection bias ; sampling error …   Dictionary of sociology

• Selection cutting — is the silvicultural practice of harvesting a proportion of the trees in a stand. Selection cutting is the practice of removing mature timber or thinning to improve the timber stand. This system may be used to manage even or uneven aged stands.… …   Wikipedia

• 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 — /sam pling, sahm /, n. 1. the act or process of selecting a sample for testing, analyzing, etc. 2. the sample so selected. [1630 40; SAMPLE + ING1] * * * ▪ statistics       in statistics, a process or method of drawing a representative group of… …   Universalium