enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Kruskal–Wallis test - Wikipedia

    en.wikipedia.org/wiki/KruskalWallis_test

    The parametric equivalent of the Kruskal–Wallis test is the one-way analysis of variance (ANOVA). A significant Kruskal–Wallis test indicates that at least one sample stochastically dominates one other sample. The test does not identify where this stochastic dominance occurs or for how many pairs of groups stochastic dominance obtains.

  3. Van der Waerden test - Wikipedia

    en.wikipedia.org/wiki/Van_der_Waerden_test

    The most common non-parametric test for the one-factor model is the Kruskal-Wallis test. The Kruskal-Wallis test is based on the ranks of the data. The advantage of the Van Der Waerden test is that it provides the high efficiency of the standard ANOVA analysis when the normality assumptions are in fact satisfied, but it also provides the ...

  4. Talk:Kruskal–Wallis test - Wikipedia

    en.wikipedia.org/wiki/Talk:KruskalWallis_test

    The Kruskal-Wallis test is indeed, in its most general application, a test of the null hypothesis that there is no stochastic dominance between any of the groups tested (i.e. H0: P(X i > X j) = 0.5 for all groups i and j, with HA: P(X i > X j) ≠ 0.5 for at least one i ≠ j). These hypotheses, and this test are not about means. I have cleaned ...

  5. Infrared lamp - Wikipedia

    en.wikipedia.org/wiki/Infrared_lamp

    Infrared lamps are also used for some night vision devices where visible light would be objectionable. Infrared lamp sources are used in certain scientific and industrial instrument for chemical analysis of liquids and gases; for example, the pollutant sulfur dioxide in air can be measured using its infrared absorption characteristics. IR ...

  6. Thermographic inspection - Wikipedia

    en.wikipedia.org/wiki/Thermographic_inspection

    When compared with other classical NDT techniques such as ultrasonic or radiographic testing, thermographic inspection is safe, nonintrusive, and usually noncontact, allowing the detection of relatively shallow subsurface defects (a few millimeters in depth) under large surfaces (typically covering an area of 30 by 30 cm (12 by 12 in) at once, although inspection of larger surfaces is possible ...

  7. Time-resolved spectroscopy - Wikipedia

    en.wikipedia.org/wiki/Time-resolved_spectroscopy

    In physics and physical chemistry, time-resolved spectroscopy is the study of dynamic processes in materials or chemical compounds by means of spectroscopic techniques.Most often, processes are studied after the illumination of a material occurs, but in principle, the technique can be applied to any process that leads to a change in properties of a material.

  8. William Kruskal - Wikipedia

    en.wikipedia.org/wiki/William_Kruskal

    William Henry Kruskal (/ ˈ k r ʌ s k əl /; October 10, 1919 – April 21, 2005) was an American mathematician and statistician. He is best known for having formulated the Kruskal–Wallis one-way analysis of variance (together with W. Allen Wallis ), a widely used nonparametric statistical method .

  9. Active thermography - Wikipedia

    en.wikipedia.org/wiki/Infrared_non-destructive...

    Halogen lamps are the suitable excitation source for this type of evaluation. Continual excitation. The simplest method usable only in special applications. A high-speed cooled infrared camera with a high sensitivity is commonly used for IRNDT applications. However, an uncooled bolometric infrared camera can be used for specific applications ...