- weighted means
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средневзвешенные значения
Англо-русский словарь терминов металлургии и сварки. 2011.
weighted means
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Weighted mean — The weighted mean is similar to an arithmetic mean (the most common type of average), where instead of each of the data points contributing equally to the final average, some data points contribute more than others. The notion of weighted mean… … Wikipedia
Weighted clothing — is the adding of weight to various parts of the body through attaching weighted pieces to the body which leave the hands free to grasp. Unlike with held weights or machines, the user is generally more apt for normal movement. In some cases… … Wikipedia
Weighted geometric mean — In statistics, given a set of data, : X = { x 1, x 2, ..., x n } and corresponding weights, : W = { w 1, w 2, ..., w n } the weighted geometric mean is calculated as: ar{x} = left(prod {i=1}^n x i^{w i} ight)^{1 / sum {i=1}^n w i} = quad exp… … Wikipedia
Inequality of arithmetic and geometric means — In mathematics, the inequality of arithmetic and geometric means, or more briefly the AM GM inequality, states that the arithmetic mean of a list of non negative real numbers is greater than or equal to the geometric mean of the same list; and… … Wikipedia
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
Cost-weighted activity index — A cost weighted activity index is a technique for measuring the changes in the output of an organisation over time. It is used particularly for Government departments and other bodies that do not operate in a market, hence normal means of… … Wikipedia
K-means algorithm — The k means algorithm is an algorithm to cluster n objects based on attributes into k partitions, k < n. It is similar to the expectation maximization algorithm for mixtures of Gaussians in that they both attempt to find the centers of natural… … Wikipedia
NASDAQ-100 Equal Weighted Index — The equal weighted version of the NASDAQ 100 Index, which consists of 100 of the largest, most actively traded non financial U.S. companies listed on the Nasdaq. Each of the securities in this market capitalization based index is initially set at … Investment dictionary
Price-Weighted Index — A stock index in which each stock influences the index in proportion to its price per share. The value of the index is generated by adding the prices of each of the stocks in the index and dividing them by the total number of stocks. Stocks with… … Investment dictionary
Mean — This article is about the statistical concept. For other uses, see Mean (disambiguation). In statistics, mean has two related meanings: the arithmetic mean (and is distinguished from the geometric mean or harmonic mean). the expected value of a… … Wikipedia
Membrane potential — Differences in concentration of ions on opposite sides of a cellular membrane lead to a voltage called the membrane potential. Many ions have a concentration gradient across the membrane, including potassium (K+), which is at a high inside and a… … Wikipedia
