# correlation

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correlation
1. The mutual or reciprocal relation of two or more items or parts. 2. The act of bringing into such a relation. 3. The degree to which variables change together.
- product-moment c. a statistical procedure which yields the c. coefficient referred to as r (−1.00 to +1.00) and involves the actual values, rather than the ranks (rank order) of the measurements.
- rank-difference c. the relationship between paired series of measurements, each ranked according to magnitude, which yields a coefficient known as rho; the value of rho varies from zero (no relationship) to +1.00 (perfect relationship).

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n.
(in statistics) the extent to which one of a pair of characteristics affects the other in a series of individuals. Such pairs of observations can be plotted as a series of points on a graph. If all the points on the resulting scatter diagram are in a straight line (which is neither horizontal nor vertical), the correlation coefficient may vary within the range of +1, where an increase of one variable is always associated with the corresponding increase in the other, to -1, where an increase of one variable is associated with a constant decrease of the other; a coefficient of 0 indicates no dependence of the one characteristic on the other of a straight line type. The regression coefficient is the average extent to which a unit increase of one characteristic influences the increase/decrease of the other. Where several factors appear to correlate with the onset of disease the relative importance of each may be calculated by the statistical technique known as multivariate analysis.

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cor·re·la·tion (kor″ə-laґshən) the degree to which one phenomenon or random variable is associated with or can be predicted from another. In statistics this usually refers to the degree to which a linear predictive relationship exists between random variables, as measured by a correlation coefficient (q.v.). Correlation is positive (never larger than 1) when both variables increase or decrease together; negative or inverse (never smaller than −1) when one variable increases when the other decreases; and defined as zero when a change in one variable does not affect the other.

Medical dictionary. 2011.

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• corrélation — [ kɔrelasjɔ̃ ] n. f. • 1718; correlacion v. 1420; bas lat. correlatio 1 ♦ Philos. Rapport entre deux phénomènes (⇒ corrélat) qui varient en fonction l un de l autre. ⇒ correspondance, interdépendance, réciprocité. ♢ Statist. Coefficient de… …   Encyclopédie Universelle

• Correlation — Corrélation Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom …   Wikipédia en Français

• Correlation — Cor re*la tion ( l? sh?n), n. [LL. correlatio; L. cor + relatio: cf. F. corr[ e]lation. Cf. {Correlation}.] Reciprocal relation; corresponding similarity or parallelism of relation or law; capacity of being converted into, or of giving place to,… …   The Collaborative International Dictionary of English

• correlation — I noun analogy, chain, collation, comparison, connection, corollary, correspondence, counterpart, equivalence, functionality, interchange, interconnection, interdependence, likeness, mutual, mutuality, parity, proportion, quid pro quo,… …   Law dictionary

• correlation — 1560s, from M.Fr. corrélation, from cor together (see COM (Cf. com )) + relation (see RELATION (Cf. relation)) …   Etymology dictionary

• correlation — [kôr΄ə lā′shən, kär΄ə lā′shən] n. [ML correlatio: see COM & RELATION] 1. mutual relationship or connection 2. the degree of relative correspondence, as between two sets of data [a correlation of 75%] 3. a correlating or being correlated… …   English World dictionary

• Correlation — (v. lat.), 1) gegenseitige Beziehung; 2) Beziehung von 2 Wörtern od. Sätzen auf einander, so daß das od. der eine die Frage od. den Satz, das od. der andere die Antwort od. die Vergleichung enthält. Hieher gehören Comparatiwerhältnisse u.… …   Pierer's Universal-Lexikon

• corrélation — CORRÉLATION. s. fém. Relation réciproque entre deux choses. Il n est d usage que dans le didactique. Les termes de père et de fils emportentcorrélation …   Dictionnaire de l'Académie Française 1798

• correlation — [n] equating, equivalence alternation, analogue, complement, correspondence, correspondent, counterpart, interaction, interchange, interconnection, interdependence, interrelation, interrelationship, match, parallel, pendant, reciprocity,… …   New thesaurus

• correlation — ► NOUN 1) a mutual relationship. 2) the process of correlating two or more things. 3) Statistics interdependence of variable quantities …   English terms dictionary

• Correlation — In probability theory and statistics, correlation, (often measured as a correlation coefficient), indicates the strength and direction of a linear relationship between two random variables. In general statistical usage, correlation or co relation …   Wikipedia