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contrast of means

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  • Contrast-enhanced ultrasound — (CEUS) is the application of ultrasound contrast medium to traditional medical sonography. Ultrasound contrast agents rely on the different ways in which sound waves are reflected from interfaces between substances. This may be the surface of a… …   Wikipedia

  • Contrast — may refer to: Contrast (vision), the difference in color and light between parts of an image Contrast (linguistics), expressing distinctions between words Contrast (statistics), a combination of averages whose coefficients add up to zero, or the… …   Wikipedia

  • Contrast (statistics) — In statistics, particularly analysis of variance, a contrast is a linear combination of two or more factor level means (averages) whose coefficients add up to zero.[1][2] A simple contrast is the difference between two means. A contrast may be… …   Wikipedia

  • Means test — A means test is a determination of whether an individual or family is eligible for help from the government. Contents 1 Canada 2 United Kingdom 3 United States 4 Other international examples …   Wikipedia

  • Means to an end — For the Biohazard album, see Means to an End. In philosophy, the term means to an end refers to any action (the means) that the sole purpose of it is to achieve something else (an end). It can be thought of as a metaphysical distinction, as no… …   Wikipedia

  • contrast ratio — adjective ratio of the luminance of white to that of black of a display. A higher value means a higher contrast of white and black. See Also: display, LCD, transparency …   Wiktionary

  • k-means clustering — In statistics and data mining, k means clustering is a method of cluster analysis which aims to partition n observations into k clusters in which each observation belongs to the cluster with the nearest mean. This results into a partitioning of… …   Wikipedia

  • Display contrast — Contrast in visual perception is the difference in appearance of two or more parts of a field seen simultaneously or successively (hence: brightness contrast, lightness contrast, color contrast, simultaneous contrast, successive contrast, etc.).… …   Wikipedia

  • Differential interference contrast microscopy — Micrasterias furcata imaged in transmitted DIC microscopy. Differential interference contrast microscopy (DIC), also known as Nomarski Interference Contrast (NIC) or Nomarski microscopy, is an optical microscopy illumination technique used to… …   Wikipedia

  • Phase contrast microscopy — Phase contrast image of a cheek epithelial cell Phase contrast microscopy is an optical microscopy illumination technique of great importance to biologists in which small (invisible to the human eye) phase shifts in the light passing through a… …   Wikipedia

  • Russell Means — in 1987. Born Russell Charles Means November 10, 1939 (1939 11 10) (age 72) Wanblee, South Dakota …   Wikipedia

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