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two-step estimation

См. также в других словарях:

  • Estimation of covariance matrices — In statistics, sometimes the covariance matrix of a multivariate random variable is not known but has to be estimated. Estimation of covariance matrices then deals with the question of how to approximate the actual covariance matrix on the basis… …   Wikipedia

  • Maximum spacing estimation — The maximum spacing method tries to find a distribution function such that the spacings, D(i), are all approximately of the same length. This is done by maximizing their geometric mean. In statistics, maximum spacing estimation (MSE or MSP), or… …   Wikipedia

  • Mixture model — See also: Mixture distribution In statistics, a mixture model is a probabilistic model for representing the presence of sub populations within an overall population, without requiring that an observed data set should identify the sub population… …   Wikipedia

  • Expectation-maximization algorithm — An expectation maximization (EM) algorithm is used in statistics for finding maximum likelihood estimates of parameters in probabilistic models, where the model depends on unobserved latent variables. EM alternates between performing an… …   Wikipedia

  • test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… …   Medical dictionary

  • Heckman correction — The Heckman correction (the two stage method, Heckman s lambda or the Heckit method) is any of a number of related statistical methods developed by James Heckman in 1976 through 1979 which allow the researcher to correct for selection bias.… …   Wikipedia

  • Errors-in-variables models — In statistics and econometrics, errors in variables models or measurement errors models are regression models that account for measurement errors in the independent variables. In contrast, standard regression models assume that those regressors… …   Wikipedia

  • Numerical differentiation — is a technique of numerical analysis to produce an estimate of the derivative of a mathematical function or function subroutine using values from the function and perhaps other knowledge about the function. Contents 1 Finite difference formulae 1 …   Wikipedia

  • Fernald Feed Materials Production Center — The Fernald Feed Materials Production Center (commonly referred to simply as Fernald) was a uranium processing facility located near the rural town of Fernald, in Hamilton County, Ohio, about 20 miles northwest of Cincinnati, which fabricated… …   Wikipedia

  • dance, Western — Introduction       history of Western dance from ancient times to the present and including the development of ballet, the waltz, and various types of modern dance.       The peoples of the West of Europe and of the countries founded through… …   Universalium

  • Chronology of Jesus — See also: Gospel harmony, Historical Jesus, and Historicity of Jesus Medieval Russian icon depicting the life of Jesus. The Chronology of Jesus aims to establish a historical order for some of the events of the life of Jesus in the four… …   Wikipedia

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