- formula of variance
- Нефть: формула дисперсии
Универсальный англо-русский словарь. Академик.ру. 2011.
formula of variance
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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 inflation factor — In statistics, the variance inflation factor (VIF) is a method of detecting the severity of multicollinearity. More precisely, the VIF is an index which measures how much the variance of a coefficient (square of the standard deviation) is… … Wikipedia
Algorithms for calculating variance — play a major role in statistical computing. A key problem in the design of good algorithms for this problem is that formulas for the variance may involve sums of squares, which can lead to numerical instability as well as to arithmetic overflow… … Wikipedia
Computational formula for the variance — See also: Algorithms for calculating variance In probability theory and statistics, the computational formula for the variance Var(X) of a random variable X is the formula where E(X) is the expected value of X. A closely related identity can be… … Wikipedia
Law of total variance — In probability theory, the law of total variance or variance decomposition formula states that if X and Y are random variables on the same probability space, and the variance of X is finite, then:operatorname{var}(X)=operatorname{E}(operatorname{v… … 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
Pollaczek–Khinchine formula — In queueing theory, a discipline within the mathematical theory of probability, the Pollaczek–Khinchine formula is a formula for the mean queue length in a model where jobs arrive according to a Poisson process and service times have a general… … Wikipedia
overhead efficiency variance — overhead productivity variance; = productivity variance In a standard costing system, that part of the overhead total variance that arises from the more or less efficient use of the time available to carry out the actual production. It compares… … Accounting dictionary
direct materials usage variance — In a standard costing system, a variance arising as part of the direct materials total cost variance. It compares the actual quantity of material used to carry out production with the standard quantity allowed, and values the difference at the… … Accounting dictionary
Poisson summation formula — The Poisson summation formula is an equation relating the coefficients of the Fourier Series of the periodic extension of a function in terms of the values of the function s continuous Fourier transform. The Poisson Summation Formula was… … Wikipedia
Whittaker–Shannon interpolation formula — The Whittaker–Shannon interpolation formula or sinc interpolation is a method to reconstruct a continuous time bandlimited signal from a set of equally spaced samples. Contents 1 Definition 2 Validity condition 3 Interpolation as convolution sum … Wikipedia
