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Definition of Correlation

Babylon English

mutual relation, mutual connection (between two or more things); similarity
Correlation Definition from Language, Idioms & Slang Dictionaries & Glossaries
Webster's Revised Unabridged Dictionary (1913)
Reciprocal relation; corresponding similarity or parallelism of relation or law; capacity of being converted into, or of giving place to, one another, under certain conditions; as, the correlation of forces, or of zymotic diseases.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter. About
hEnglish - advanced version

 indirect correlation 
 rank-order correlation coefficient 
 kendall partial rank correlation 
 tetrachoric correlation 
 tau coefficient of correlation 
 rank-order correlation 
 rank-difference correlation 
 kendall rank correlation 
 correlation of forces 
 tetrachoric correlation coefficient 
 rank-difference correlation coefficient 
WordNet 2.0

1. a reciprocal relation between two or more things
(synonym) correlativity
(hypernym) reciprocality, reciprocity
(derivation) correlate
2. a statistic representing how closely two variables co-vary; it can vary from -1 (perfect negative correlation) through 0 (no correlation) to +1 (perfect positive correlation); "what is the correlation between those two variables?"
(synonym) correlation coefficient, coefficient of correlation
(hypernym) parametric statistic
(hyponym) product-moment correlation coefficient, Pearson product-moment correlation coefficient
(derivation) correlate
(classification) statistics
3. a statistical relation between two or more variables such that systematic changes in the value of one variable are accompanied by systematic changes in the other
(synonym) correlational statistics
(hypernym) statistics
(hyponym) curvilinear correlation, nonlinear correlation, skew correlation
(part-holonym) correlational analysis
(derivation) correlate
Correlation Definition from Business & Finance Dictionaries & Glossaries
A measure of the relationship between two data sets of variables.
Campbell R. Harvey's Hypertextual Finance Glossary
Applies to derivative products. Statistical measure of the degree to which the movements of two variables (stock/option/convertible prices or returns) are related. See: Correlation coefficient.
Copyright © 2000, Campbell R. Harvey. All Rights Reserved.
Sean_Woo's Finance,GIS & Real Estate Glossary
1. In portfolio theory, the coefficient of correlation is used to know the extent to which two series are relative.
Note: the correlation may only range between +1 and -1; when approaching +1, two series are positive correlated; hence if a change in one of the series, there is a high likelihood of a change of the other series in the same direction. when approaching -1, two series are negatively correlated, they will move in exactly opposite direction. when approaching 0, no relationship exits between the two series.
2. Covariance that is scaled so that values range from -1, when variables vary opposite of each other,
to 1 when they vary together.
See also covariance.
Correlation Definition from Social Science Dictionaries & Glossaries
Glossary of Sociology
The relationship between two variables in which they vary together--say a correlation between the income of parents and reading ability among primary school children. Statistical correlation can vary from -1 to 1 (a 0 indicates no correlation between the variables). A positive correlation between two variables exists where a high score on one is associated with a high score on the other. A negative correlation is where a high score on one variable is associated with a low score on the other.
Environmental Economics Glossary
relationship that results when a change in one variable is consistently associated with a change in another one
Learning, Performance and Training Definitions
The relationship between two sets of data, that when one changes, the other is likely to make a corresponding change. If the changes are in the same direction, then there is a positive correlation. If it is in the opposite direction, then it is a negative correlation.
Donald Clark
Correlation Definition from Science & Technology Dictionaries & Glossaries
EIA Energy Glossary
In its most general sense, correlation denotes the interdependence between quanitative or qualitative data. It would include the association of dichotomized attributes and the contingency of multiple classified attributes. The concept is quite general and may be extended to more than two variates. The word is most frequently used in a somewhat narrower sense to denote the relationship between measurable variates or ranks.
Source: Energy Information Administration, 2006
Electronic Statistics Textbook
Correlation is a measure of the relation between two or more variables. Correlation coefficients can range from -1.00 to +1.00. The value of -1.00 represents a perfect negative correlation while a value of +1.00 represents a perfect positive correlation . A value of 0.00 represents a lack of correlation.
See also, Correlation , Partial Correlation , Pearson Correlation and Spurious Correlations .
Web Dictionary of Cybernetics and Systems
Covariation of two or more variables; a relation between the values of two or more variables that is manifest in the variation of cooccurrances. In statistics, that form of an association in which an increase in the value of one variable tends to either increase the values of the other (positive correlation) or decrease the values of the other (negative correlation) rendering one variable (linearly or non-linearly) dependent on the other. (Krippendorff )
Correlation Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
In statistics, dependence is any statistical relationship between two random variables or two sets of data. Correlation refers to any of a broad class of statistical relationships involving dependence, though it most in common usage often refers to the extent to which two variables have a linear relationship with each other. Familiar examples of dependent phenomena include the correlation between the physical statures of parents and their offspring, and the correlation between the demand for a product and its price.

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Correlation Definition from Society & Culture Dictionaries & Glossaries
Environmental Engineering (English ver.)
(Statistics) A statistical means to measure the degree of "coincidence of change" between two variables, producing a value of variance termed the Correlation Coefficient. In strict correlation analysis, no inference of causation, i.e., one variable being "explained" by the variations of another, is made. Therefore, high correlations do not provide for an inference of causality; one must use previous information that the two sampled variables are indeed related to one another. The concept of the Coefficient of Determination, on the other hand, used as a common measure of "Goodness of Fit" in Regression Analysis, is used to assess the degree of causation between two variables or between one or more independent variables and a single dependent variable. The coefficient of determination is equivalent to the square of the correlation coefficient and reflects the percent of change in the dependent (explained) variable that is explained by the variations in the independent (explanatory) variable.
Correlation Definition from Medicine Dictionaries & Glossaries
Hepatitis Central (TM) Liver Disease Medical Glossary