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1A mutual relationship or connection between two or more things.

*‘research showed a clear correlation between recession and levels of property crime’*mass noun*‘there was no correlation between the number of visits to the clinic and the treatment outcome’**‘Back in the Fifties sociological research found that there was a clear correlation between how society viewed people and the prevailing political attitudes.’**‘The survey also found a clear correlation between leadership and progress on this agenda.’**‘There is a clear correlation between petrol price and consumption.’**‘Research finds an observable correlation between trade relations and improved warmth of feeling.’**‘‘Our research shows that there is a clear correlation between experience and proclivity to buy,’ he said.’**‘In that study, a positive correlation between clear observations and seasonality could not be found.’**‘There is a clear correlation between literacy and growth (though the direction of causation was not all one way).’**‘The clear correlation between climate and vegetation becomes more obscure at a local scale.’**‘As far as the core features are concerned, there is a clear correlation between the size of the company and the likelihood of its displaying all five core features.’**‘These results showed a clear correlation between quality of life and the level of air pollutants.’**‘There was a clear correlation between restoration of weight and the rate of wound healing.’**‘Intuitively, one would expect to find a significant correlation between employee engagement and what a business produces.’**‘English-speaking children very soon catch on to the correlation between the conceptual distinction and the distributional cues for it.’**‘A negative correlation between triangulation and intimacy has also been demonstrated.’**‘Each bone displays an intimate correlation between form and function.’**‘Overall these papers reinforce the idea that the evidence for a correlation between income inequality and the health of the population is slowly dissipating.’**‘One factor that raises variance is a positive correlation between genetic and environmental variables.’**‘I'm stretching a point here, but I hope the correlation between food choices and advertising is clear.’**‘Most children must learn fairly early in their television viewing lives that there is not an exact correlation between advertising claims and the truth.’**‘Moreover, as Lomborg points out, there is a strong correlation between increased prosperity and environmental improvement.’*

View synonyms**connection**, association, link, tie-in, tie-up, relation, relationship, interrelationship, interdependence, interconnection, interaction- 1.1mass noun The process of establishing a relationship or connection between two or more things.
*‘the increasingly similar basis underlying national soil maps allows correlation to take place more easily’**‘This allows for rapid correlation of sequence data with biological functions.’**‘Within parentals, we used correlation to investigate the relationship between body weight and risk.’**‘Ammonites are abundant and diverse and allow correlation with the standard Albian section of the Anglo-Paris Basin.’**‘On the other hand, as mentioned in the previous section, path analysis does not allow any correlation among the error terms.’**‘The need for good fossil data for correlation remains critical.’**‘In more detail, correlation of the data with surface geology allows controls to be placed on the deep structure of the orogenic units and the age of the reflections.’**‘The sediments are noted for their rich ammonoid faunas, which allow detailed biostratigraphic subdivision and correlation.’*

- 1.2Statistics mass noun Interdependence of variable quantities.
*‘He took up this post in January 1927 and his first published papers are on the theory of correlation.’**‘The Spearman rank correlation coefficient was computed to assess correlation between continuous variables.’**‘Because of the high degree of intercorrelation among the needs variables, we used correlation, cluster, and regression analysis to aid data reduction.’**‘I reordered the values so that there was a maximum positive correlation between the two variables.’**‘Also, we used nonparametric correlation tests in bivariate analyses that included these variables.’*

- 1.3Statistics A quantity measuring the extent of the interdependence of variable quantities.
*‘Thus statistical correlations derived from quantitative research can be further explained using qualitative techniques.’**‘The average of the two correlations was used to quantify the dependence of tests conducted within the interval.’**‘Just as was done on the 13 individual test scores, we can go further and measure the correlations among these four group factors.’**‘On the contrary, the correlation between estimated and true liabilities was 0.80 over a wide range of parameters.’**‘For all variance components, the correlation between the two results is close to 1.’*

**Origin**

Mid 16th century from medieval Latin correlatio(n-), from cor- ‘together’ + relatio (see relation).

**Pronunciation**

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