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observed variance

См. также в других словарях:

  • Variance — In probability theory and statistics, the variance of a random variable, probability distribution, or sample is one measure of statistical dispersion, averaging the squared distance of its possible values from the expected value (mean). Whereas… …   Wikipedia

  • Variance reduction — In mathematics, more specifically in the theory of Monte Carlo methods, variance reduction is a procedure used to increase the precision of the estimates that can be obtained for a given number of iterations. Every output random variable from the …   Wikipedia

  • Analysis of variance — In statistics, analysis of variance (ANOVA) is a collection of statistical models, and their associated procedures, in which the observed variance in a particular variable is partitioned into components attributable to different sources of… …   Wikipedia

  • analysis of variance — noun A collection of statistical models, and their associated procedures, in which the observed variance is partitioned into components due to different explanatory variables. Syn: ANOVA …   Wiktionary

  • Analysis of Variance —   (ANOVA)   Tool used in statistics to apportion observed variance into probable causes, e.g. when used to determine the significance of variances between measurable items in different populations …   Expanded glossary of Cycad terms

  • Cosmic variance — For the weblog, see Cosmic Variance (blog). Physical cosmology Universe …   Wikipedia

  • Normal variance-mean mixture — In probability theory and statistics, a normal variance mean mixture with mixing probability density g is the continuous probability distribution of a random variable Y of the form where α and β are real numbers and σ > 0 and random variables… …   Wikipedia

  • Constant Elasticity of Variance Model — In mathematical finance, the CEV or Constant Elasticity of Variance model is a stochastic volatility model, which attempts to capture stochastic volatility and the leverage effect. The model is widely used by practitioners in the financial… …   Wikipedia

  • Long range weather forecasts — A real time trial of a methodology utilised to generate Day 1 to Day 7 forecasts, by mechanically integrating judgmental (human) and automated predictions, has been ongoing since 20 August 2005 (Stern (2007a).It has been found that the sets of… …   Wikipedia

  • Overdispersion — In statistics, overdispersion is the presence of greater variability (statistical dispersion) in a data set than would be expected based on a given simple statistical model. A common task in applied statistics is choosing a parametric model to… …   Wikipedia

  • Cronbach's alpha — Cronbach s α (alpha)[1] is a coefficient of reliability. It is commonly used as a measure of the internal consistency or reliability of a psychometric test score for a sample of examinees. It was first named alpha by Lee Cronbach in 1951, as he… …   Wikipedia

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