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group variation

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  • Group delay and phase delay — Group delay is a measure of the time delay of the amplitude envelopes of the various sinusoidal components of a signal through a device under test, and is a function of frequency for each component. Phase delay is a similar measure of the time… …   Wikipedia

  • Group buying — Group buying, also known as collective buying, offers products and services at significantly reduced prices on the condition that a minimum number of buyers would make the purchase. Origins of group buying can be traced to China[citation needed]… …   Wikipedia

  • Group 5 (racing) — Group 5 was an FIA classification for cars in sportscar racing. Although originally for limited production sports cars, the class was redefined in 1972 to exclude any minimum production requirement, and again in 1976 to become a liberal… …   Wikipedia

  • Variation ratio — The variation ratio is a simple measure of statistical dispersion in nominal distributions; it is the simplest measure of qualitative variation.It is defined as the percent of cases which are not the mode::mathbf{v} := 1 frac{f m}{N}.While a… …   Wikipedia

  • Group development — The goal of most research on group development is to learn why and how small groups change over time. To do this, researchers examine patterns of change and continuity in groups over time. Aspects of a group that might be studied include the… …   Wikipedia

  • variation — variational, variative /vair ee ay tiv/, adj. variationally, variatively, adv. /vair ee ay sheuhn/, n. 1. the act, process, or accident of varying in condition, character, or degree: Prices are subject to variation. 2. an instance of this: There… …   Universalium

  • Group selection — In evolutionary biology, group selection refers to the idea that alleles can become fixed or spread in a population because of the benefits they bestow on groups, regardless of the alleles effect on the fitness of individuals within that group.… …   Wikipedia

  • Group velocity — [ Frequency dispersion in bichromatic groups of gravity waves on the surface of deep water. The red dot moves with the phase velocity, and the green dots propagate with the group velocity. In this deep water case, the phase velocity is twice the… …   Wikipedia

  • variation — 1. Deviation from the type, especially the parent type, in structure, form, physiology, or behavior. 2. SYN: type (3). [L. variatio, fr. vario, to change, vary] continuous v. a series of very slight variations …   Medical dictionary

  • Group (travel) — A set of individuals traveling together and involved in similar activities. There are two types of groups:#Affinity groups composed of people whose common interest lies outside of the trip (e.g. a church group). #Transient groups composed of… …   Wikipedia

  • Variation of the field — In heraldry, variations of the field are any of a number of ways that a field (or a charge) may be covered with a pattern, rather than a flat tincture or a simple division of the field. Contents 1 Patterning with ordinaries and subordinaries 1.1… …   Wikipedia

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