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Estimator. In statistics, an estimator is a rule for calculating an estimate of a given quantity based on observed data: thus the rule (the estimator), the quantity of interest (the estimand) and its result (the estimate) are distinguished. [1] For example, the sample mean is a commonly used estimator of the population mean.
James–Stein estimator. The James–Stein estimator is a biased estimator of the mean, , of (possibly) correlated Gaussian distributed random variables with unknown means . It arose sequentially in two main published papers. The earlier version of the estimator was developed in 1956, [1] when Charles Stein reached a relatively shocking ...
Minimum-variance unbiased estimator. In statistics a minimum-variance unbiased estimator (MVUE) or uniformly minimum-variance unbiased estimator (UMVUE) is an unbiased estimator that has lower variance than any other unbiased estimator for all possible values of the parameter. For practical statistics problems, it is important to determine the ...
In statistics, point estimation involves the use of sample data to calculate a single value (known as a point estimate since it identifies a point in some parameter space) which is to serve as a "best guess" or "best estimate" of an unknown population parameter (for example, the population mean). More formally, it is the application of a point ...
Revenue rose slightly from $42.92 billion in the year-ago period. Comparable sales dropped 3.3% in the quarter across the business and declined 3.6% in the U.S. That was worse than the 2.1% ...
This is an accepted version of this page This is the latest accepted revision, reviewed on 10 September 2024. American multinational home improvement supplies retailing company The Home Depot, Inc. Company type Public Traded as NYSE: HD DJIA component S&P 100 component S&P 500 component Industry Retail (home improvement) Founded February 6, 1978 ; 46 years ago (1978-02-06) in Marietta, Georgia ...