sample characteristic

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• 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

• Characteristic function (probability theory) — The characteristic function of a uniform U(–1,1) random variable. This function is real valued because it corresponds to a random variable that is symmetric around the origin; however in general case characteristic functions may be complex valued …   Wikipedia

• 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

• Characteristic earthquakes — Almost all geology is fractal and scale invariant. That means you should always put in a scale when taking pictures of rock formations. For example, in this picture, you can’t tell if it is 6 m or 6 km across. It’s actually an ASTER satellite… …   Wikipedia

• Characteristic property — A characteristic property is a chemical or physical property that helps identify and classify substances. The characteristic properties of a substance are always the same whether the sample you are observing is large or small. Examples of… …   Wikipedia

• sample — Synonyms and related words: adjunct, assay, barometer, bite, bring to test, canvass, case, case history, characteristic, component, conduct a poll, confirm, constituent, contingent, cross section, cut and try, detachment, detail, distinctive,… …   Moby Thesaurus

• characteristic — Synonyms and related words: affection, affective, appropriate, aroma, attribute, automatism, bad habit, badge, banner, birthmark, body build, brand, cachet, cast, categorical, character, characteristics, characterizing, classificational,… …   Moby Thesaurus

• Toxicity characteristic leaching procedure — (TCLP) is a soil sample extraction method for chemical analysis employed as an analytical method to simulate leaching through a landfill. The leachate is analysed for substances appropriate to the protocol.The Resource Conservation and Recovery… …   Wikipedia

• cluster sample — a variation of a random sample in which the population is divided into groups on the basis of some shared characteristic (such as hospitals grouped by geographic region) and a random sample is drawn from each group …   Medical dictionary

• spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …   Universalium

• Central limit theorem — This figure demonstrates the central limit theorem. The sample means are generated using a random number generator, which draws numbers between 1 and 100 from a uniform probability distribution. It illustrates that increasing sample sizes result… …   Wikipedia