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population sample

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  • sample — {{Roman}}I.{{/Roman}} noun 1 people in a survey ADJECTIVE ▪ large, small ▪ total ▪ population ▪ national ▪ ran …   Collocations dictionary

  • Sample size determination — is the act of choosing the number of observations to include in a statistical sample. The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample. In practice, the sample …   Wikipedia

  • Sample mean and sample covariance — are statistics computed from a collection of data, thought of as being random.ample mean and covarianceGiven a random sample extstyle mathbf{x} {1},ldots,mathbf{x} {N} from an extstyle n dimensional random variable extstyle mathbf{X} (i.e.,… …   Wikipedia

  • Population stratification — is the presence of a systematic difference in allele frequencies between subpopulations in a population possible due to different ancestry. Population stratification is also referred to as population structure. Causes of population stratification …   Wikipedia

  • sample — ► NOUN 1) a small part or quantity intended to show what the whole is like. 2) Statistics a portion of a population, serving as a basis for estimates of the attributes of the whole population. 3) a specimen taken for scientific testing or… …   English terms dictionary

  • Population without double counting — is an English translation of the phrase Population sans doubles comptes.In France, for census purposes, the INSEE has defined several population indicators that allow for the double counting of certain personnel, in order to study the phenomenon… …   Wikipedia

  • sample — [sam′pəl, säm′pəl] n. [ME, aphetic for asample < Anglo Fr, for OFr essample: see EXAMPLE] 1. a part, piece, or item taken or shown as representative of a whole thing, group, species, etc.; specimen; pattern [samples of wallpaper] 2. an… …   English World dictionary

  • population — [päp΄yə lā′shən] n. [LL populatio] 1. a) all the people in a country, region, etc. b) the number of these c) a (specified) part of the people in a given area [the Japanese population of Hawaii] 2. a populating or being populated …   English World dictionary

  • Sample size — The sample size of a statistical sample is the number of observations that constitute it. It is typically denoted n , a positive integer (natural number).Typically, all else being equal, a larger sample size leads to increased precision in… …   Wikipedia

  • Sample (statistics) — In statistics, a sample is a subset of a population. Typically, the population is very large, making a census or a complete enumeration of all the values in the population impractical or impossible. The sample represents a subset of manageable… …   Wikipedia

  • Sample maximum and minimum — Box plots of the Michelson–Morley experiment, showing sample maximums and minimums. In statistics, the maximum and sample minimum, also called the largest observation, and smallest observation, are the values of the greatest and least elements of …   Wikipedia

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