noun1.mutual relation of two or more things, parts, etc.: Studies find a positive correlation between severity of illness and nutritional status of the patients. Synonyms: similarity, correspondence, matching; parallelism, equivalence; interdependence, interrelationship, interconnection.
2.the act of correlating or state of being correlated.
3.Statistics . the degree to which two or more attributes or measurements on the same group of elements show a tendency to vary together.
4.Physiology . the interdependence or reciprocal relations of organs or functions.
5.Geology . the demonstrable equivalence, in age or lithology, of two or more stratigraphic units, as formations or members of such.
This is according to Dictionary.com
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It mean that there is no correlation between the two variables. The variables are the same.
The correlation coefficient is symmetrical with respect to X and Y i.e.The correlation coefficient is the geometric mean of the two regression coefficients. or .The correlation coefficient lies between -1 and 1. i.e. .
Correlation analysis is the relationship of two values. When two items are similar, they will have a high correlation. Should they differ, they will be much lower in variables.
Probably a mis-spelling of "correlation".
"If coefficient of correlation, "r" between two variables is zero, does it mean that there is no relationship between the variables? Justify your answer".