In probability theory and statistics, variance is the expected value of the squared deviation from the mean of a random variable. The standard deviation... 57 KB (9,996 words) - 06:24, 29 April 2024 |
Homoscedasticity and heteroscedasticity (redirect from Homogeneity of variance) all its random variables have the same finite variance; this is also known as homogeneity of variance. The complementary notion is called heteroscedasticity... 27 KB (3,180 words) - 19:52, 25 February 2024 |
In statistics and machine learning, the bias–variance tradeoff describes the relationship between a model's complexity, the accuracy of its predictions... 26 KB (3,546 words) - 19:25, 19 March 2024 |
Analysis of variance (ANOVA) is a collection of statistical models and their associated estimation procedures (such as the "variation" among and between... 56 KB (7,615 words) - 09:29, 11 February 2024 |
Look up variance in Wiktionary, the free dictionary. In probability theory and statistics, variance measures how far a set of numbers are spread out.... 913 bytes (141 words) - 13:51, 24 April 2019 |
Standard deviation (redirect from Standard variance) population, data set, or probability distribution is the square root of its variance. It is algebraically simpler, though in practice less robust, than the... 55 KB (7,602 words) - 16:24, 23 April 2024 |
Weighted arithmetic mean (redirect from Weighted variance) variance σ i 2 {\displaystyle \sigma _{i}^{2}} , all having the same mean, one possible choice for the weights is given by the reciprocal of variance:... 44 KB (8,991 words) - 12:09, 22 April 2024 |
Covariance matrix (redirect from Variance-covariance matrix) matrix (also known as auto-covariance matrix, dispersion matrix, variance matrix, or variance–covariance matrix) is a square matrix giving the covariance between... 34 KB (5,418 words) - 17:12, 21 April 2024 |
theory, the law of total variance or variance decomposition formula or conditional variance formulas or law of iterated variances also known as Eve's law... 15 KB (2,796 words) - 17:43, 10 April 2024 |
In statistics, the variance inflation factor (VIF) is the ratio (quotient) of the variance of a parameter estimate when fitting a full model that includes... 11 KB (1,579 words) - 22:32, 23 January 2024 |
Gender variance or gender nonconformity is behavior or gender expression by an individual that does not match masculine or feminine gender norms. A gender-nonconforming... 46 KB (4,922 words) - 05:50, 29 April 2024 |
Median (redirect from Variance of the median) the minimum-variance mean (for large normal samples), which is to say the variance of the median will be ~50% greater than the variance of the mean.... 59 KB (7,641 words) - 12:21, 26 April 2024 |
The generalized variance is a scalar value which generalizes variance for multivariate random variables. It was introduced by Samuel S. Wilks. The generalized... 797 bytes (82 words) - 07:57, 29 October 2023 |
Sales variance is the difference between actual sales and budgeted sales. It is used to measure the performance of a sales function, and/or analyze business... 2 KB (207 words) - 08:40, 22 February 2024 |
Normal distribution (section Zero-variance limit) the parameter σ {\displaystyle \sigma } is its standard deviation. The variance of the distribution is σ 2 {\displaystyle \sigma ^{2}} . A random variable... 141 KB (22,328 words) - 17:33, 11 April 2024 |
moment (about the origin) of the error, and thus incorporates both the variance of the estimator (how widely spread the estimates are from one data sample... 24 KB (3,827 words) - 19:57, 14 February 2024 |
In statistics, pooled variance (also known as combined variance, composite variance, or overall variance, and written σ 2 {\displaystyle \sigma ^{2}} )... 14 KB (3,138 words) - 06:10, 2 February 2024 |
should be substitutable wherever an expression of type Animal is used. Variance is how subtyping between more complex types relates to subtyping between... 53 KB (6,691 words) - 21:42, 23 December 2023 |
In probability theory and statistics, a conditional variance is the variance of a random variable given the value(s) of one or more other variables. Particularly... 6 KB (1,085 words) - 03:19, 13 March 2024 |
Modern portfolio theory (redirect from Minimum variance set) Modern portfolio theory (MPT), or mean-variance analysis, is a mathematical framework for assembling a portfolio of assets such that the expected return... 52 KB (7,883 words) - 16:00, 5 April 2024 |
In statistics, inverse-variance weighting is a method of aggregating two or more random variables to minimize the variance of the weighted average. Each... 8 KB (1,328 words) - 00:42, 15 April 2024 |
In variance analysis (accounting) direct material total variance is the difference between the actual cost of actual number of units produced and its... 2 KB (151 words) - 19:23, 18 April 2021 |
F-test (redirect from Variance ratio statistic) F-test is any statistical test used to compare the variances of two samples or the ratio of variances between multiple samples. The test statistic, random... 17 KB (2,176 words) - 11:10, 5 January 2024 |
Algorithms for calculating variance play a major role in computational statistics. A key difficulty in the design of good algorithms for this problem is... 31 KB (5,769 words) - 20:41, 11 March 2024 |
In mathematics, more specifically in the theory of Monte Carlo methods, variance reduction is a procedure used to increase the precision of the estimates... 6 KB (865 words) - 20:13, 13 October 2023 |
statistics, the variance function is a smooth function that depicts the variance of a random quantity as a function of its mean. The variance function is... 24 KB (4,499 words) - 20:30, 14 September 2023 |
Price variance (Vmp) is a term used in cost accounting which denotes the difference between the expected cost of an item (standard cost) and the actual... 2 KB (213 words) - 16:47, 10 November 2023 |