Correlation

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Correlation
A Wisdom Archive on Correlation

Correlation A selection of articles related to Correlation

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correlation, Correlation, Correlation - Copulas and correlation, Correlation - Correlation does not imply causation, Correlation - Correlation matrices, Correlation - Non-parametric correlation coefficients, Correlation - Other measures of dependence among random variables, Correlation - Pearson's product-moment coefficient, Correlation - Mathematical properties, Correlation - The sample correlation

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ARTICLES RELATED TO Correlation

Correlation: Encyclopedia - Correlation

In probability theory and statistics, correlation, also called correlation coefficient, is a numeric measure of the strength of linear relationship between two random variables. In general statistical usage, correlation or co-relation refers to the departure of two variables from independence. In this broad sense there are several coefficients, measuring the degree of correlation, adapted to the nature of data. A number of different coefficients are used for different situations. The best known is the Pearson prod ...

Including:

Correlation - Pearson's product-moment coefficient

Correlation: Parapsychology Dictionary on Correlation

Correlation:

An association between two or more events or variables.

Correlation: Encyclopedia II - Correlation - Correlation matrices

The correlation matrix of n random variables X1, ..., Xn is the n × n matrix whose i,j entry is corr(Xi, Xj). If the measures of correlation used are product-moment coefficients, the correlation matrix is the same as the covariance matrix of the standardized random variables Xi /SD(Xi) for i = 1, ..., n. Consequent ...

Including:

Cross-correlation - Properties

Correlation: Encyclopedia II - Correlation - Pearson's product-moment coefficient

Correlation - Mathematical properties. The correlation ρX, Y between two random variables X and Y with expected values μX and μY and standard deviations σX and σY is defined as: Since μX = E(X), σX2 = E(X2) − E2(XSee also:

Correlation: Encyclopedia - Correlation function

For stochastic processes, including those that arise in statistical mechanics and Euclidean quantum field theory, a correlation function is the correlation between random variables at two different points in space or time. If one considers the correlation function between random variables at the same point but at two different times then one refers to this as the autocorrelation function. If there are multiple random variables in the problem then correlation functions of the same random variable are also sometimes called autocorrelation. Correlation functions of different rando ...

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Correlation: Encyclopedia - Correlative based fallacies

In logic, correlative based fallacies, also known as fallacies of distraction, are logical fallacies based on correlative conjunctions. A correlative conjunction is a relationship between two statements where one must be false and the other true. In formal logic this is known as the exclusive or relationship. Examples of correlatives are: A: Object one is larger than object two. B: Object one is smaller or the same size as object two.

Correlation: Encyclopedia - Correlation dimension

In chaos theory the correlation dimension (denoted by ν) is a measure of the dimensionality of the space occupied by a set of random points. For example, if we have a set of random points on the real number line between 0 and 1, the correlation dimension will be ν=1, while if they are distributed on say, a triangle embedded 3-space (or N-space, for that matter), the correlation dimension will be ν=2. This is what we would intuitively expect from a measure of dimension. The real utility of the correlation dimension is in determining ...

Correlation: Encyclopedia - Correlation function astronomy

Astronomers describe the distribution of galaxies in the universe by means of a correlation function. By default, correlation function refers to the two-point autocorrelation function. For a given distance, the two-point autocorrelation function is a function of one variable (distance) which describes the probability that two galaxies are separated by this particular distance. It can be thought of as a lumpiness factor - the higher the value for some ...

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Correlation function astronomy - External references

Correlation: Encyclopedia - Correlation function quantum field theory

In quantum field theory, correlation functions generalize the concept of correlation functions in statistics. In the quantum mechanical context they are computed as the matrix element of a product of operators inserted between two vectors, usually the vacuum states. Sometimes, the time-ordering operator T is included. Time ordering appears in the path integral formulation and the Schwinger-Dyson equations. Without time ...

Correlation: Encyclopedia - Correlation implies causation logical fallacy

Correlation implies causation, also known as cum hoc ergo propter hoc (Latin for "with this, therefore because of this") and false cause, is a logical fallacy by which two events that occur together are claimed to be cause and effect. For example: Teenage girls eat lots of chocolate. Teenage girls have acne. Therefore, chocolate causes acne. This argument, and any of this pattern, is an example of a false categorical syllogism. One observatio ...

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Correlation implies causation logical fallacy - Humorous example

Correlation: Encyclopedia - Celestial Kingdom

The Celestial Kingdom refers to a division of heaven and was coined by the controversial Swedish theologian Emanuel Swedenborg in his 1758 book entitled Heaven and Hell. In Mormonism, it is the highest of three kingdoms of heaven, where God dwells. Celestial Kingdom - Emanuel Swedenborg. Celestial Kingdom has historically referred to a division of heaven and was coined by the controversial Swedish theologian Emanuel Swedenborg in his 1758 book entitled Heaven and Hell. Based on a vision ...

Including:

Celestial Kingdom - Possible Correlations

Correlation: Encyclopedia - Biology and sexual orientation

Biological factors / Choice / Environment Demographics / History Gender role / Gender identity Human sexual behavior / Animal sexuality Critiques of sexual behavior Gay rights / Laws / Same-sex marriage Homophobia / Biphobia / Psychology Medical science / Gay community Two-Spirit / Violence against LGBT people History of the Gay Community ...

Including:

Biology and sexual orientation - Early fixation hypothesis

Correlation: Encyclopedia - Attention

Attention is the cognitive process of selectively concentrating on one thing while ignoring other things. Examples include listening carefully to what someone is saying while ignoring other conversations in the room (e.g. the cocktail party problem, Cherry, 1953). Attention can also be split, as when a person drives a car, puts on makeup, and talks on a cell phone at the same time. (Never really try this, however.) Attention is one of the most intensely studied topics within psychology and cognitive neuroscience. Of the many co ...

Including:

Attention - History of the study of attention

Attention - Current research

Attention - Human attention

Correlation: Encyclopedia - Working memory

In cognitive psychology, working memory is the collection of structures and processes used for temporarily storing and manipulating information. The term was first used in the 1960s in the context of theories that likened the mind to a computer. A second source of the concept of working memory is the distinction between short-term memory and long-term memory. Most theorists today use the concept of working memory to replace or include the older concept of short-term memory, thereby marking a stronger emphasis on the notion of manipula ...

Including:

Working memory - Overview

Correlation: Encyclopedia - Configuration interaction

Configuration interaction (CI) is a post Hartree-Fock linear variational method for solving the nonrelativistic Schrödinger equation within the Born-Oppenheimer approximation for a quantum chemical multi-electron system. Two meanings are connected to the term configuration interaction in this context. Mathematically, configuration simply describes the linear combination of Slater determinants used for the wave function. In terms of a specification of orbital occupation (for instance, (1s)2(2s)2

Correlation: Encyclopedia - Color temperature

"White light" is commonly described by its color temperature. A traditional incandescent light source's color temperature is determined by comparing its hue with a theoretical, heated black-body radiator. The lamp's color temperature is the temperature in kelvins at which the heated black-body radiator matches the hue of the lamp. Color temperature - Categorizing different lighting. Because it is the standard against which other light sources are compared, the color temperature of a black-body radiator of c ...

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Correlation: Encyclopedia - Wealth condensation

Wealth condensation is a theoretical process by which, in certain conditions, newly-created wealth tends to become concentrated in the possession of already-wealthy individuals or entities. According to this theory, those who already hold wealth have the means to invest in new sources of creating wealth or to otherwise leverage the accumulation of wealth, thus are the beneficiaries of the new wealth. Wealth condensation - Political objections to Wealth condensation. Two processes that some critics claim are ...