empirical rule
That a normal distribution has 68% of its observations within one standard deviation of the mean, 95% within two, and 99.7% within three.

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• Empirical Rule — A statistical rule stating that for a normal distribution, almost all data will fall within three standard deviations of the mean. Broken down, the empirical rule shows that 68% will fall within the first standard deviation, 95% within the first… …   Investment dictionary

• empirical rule — empirinė taisyklė statusas T sritis automatika atitikmenys: angl. empirical rule; rule of thumb vok. empirische Regel, f; Faustregel, f rus. практическое правило, n; эмпирическое правило, n pranc. règle empirique, f …   Automatikos terminų žodynas

• rule of thumb — empirinė taisyklė statusas T sritis automatika atitikmenys: angl. empirical rule; rule of thumb vok. empirische Regel, f; Faustregel, f rus. практическое правило, n; эмпирическое правило, n pranc. règle empirique, f …   Automatikos terminų žodynas

• Empirical formula — Formula For mu*la, n.; pl. E. {Formulas}, L. {Formul[ae]}. [L., dim. of forma form, model. See{Form}, n.] 1. A prescribed or set form; an established rule; a fixed or conventional method in which anything is to be done, arranged, or said. [1913… …   The Collaborative International Dictionary of English

• Abegg's rule — Empirical rule that the solubility of salts of alkali metals with strong acids decreases from lithium to caesium, i.e., with increase of relative atomic mass, and those with weak acids follow the opposite order. Sodium chloride is an exception to …   Dictionary of automotive terms

• 68-95-99.7 rule — The 68 95 99.7 rule, or three sigma rule, or empirical rule, states that for a normal distribution, almost all values lie within 3 standard deviations of the mean.About 68% of the values lie within 1 standard deviation of the mean (or between the …   Wikipedia

• Gnevyshev-Ohl rule — The Gnevyshev Ohl rule is an empirical rule according to which the sum of sunspot numbers over an odd cycle exceeds that of the preceding even cycle. See Gnevishev M.N., Ohl A.I., 1948: About 22 year cycle of solar activity. Astronomical Journal …   Wikipedia

• 68–95–99.7 rule — noun That a normal distribution has 68% of its observations within one standard deviation of the mean, 95% within two, and 99.7% within three. Syn: empirical rule …   Wiktionary

• Dühring's rule — noun An empirical rule stating that a linear relationship exists between the temperatures at which two solutions exert the same vapor pressure. See Also: Dührings plot …   Wiktionary

• Criticisms of Communist party rule — This article only discusses criticisms that are specific to Communist states and not necessarily to other forms of socialism. See criticisms of socialism and criticisms of Marxism for discussions of literature and viewpoints objecting to… …   Wikipedia