correlation coefficient


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correlation coefficient

[‚kär·ə′lā·shən ‚kō·i′fish·ənt]
(statistics)
A measurement, which is unchanged by both addition and multiplication of the random variable by positive constants, of the tendency of two random variables X and Y to vary together; it is given by the ratio of the covariance of X and Y to the square root of the product of the variance of X and the variance of Y.

correlation coefficient

a measure of the association between two variables. See CORRELATION, PEARSON PRODUCT MOMENT CORRELATION COEFFICIENT, SPEARMAN RANK CORRELATION COEFFICIENT.
References in periodicals archive ?
To guarantee the concurrent validity of the screening checklist for students with learning difficulties in mathematics Pearson correlation coefficient was used.
No other authors till date have considered the concept of correlation coefficient for IVNSs.
WAP shows a similar trend with AHP, with a correlation coefficient of 0.
There was an inverse correlation between age and insulin adherence on the preceding day (the Spearman correlation coefficient r=-0.
Genetic correlation coefficient is not influenced by environmental factors, it truly reflects the heritable relationship between quantitative traits, therefore, it is better in the breeding selection than phenotypic correlation coefficient (Wang et al.
Composite scores for HAM-D-U at baseline and at two weeks interval were highly correlated with each other by using Bivariate Correlation Coefficient (r= 0.
Genotypic and phenotypic correlation coefficients obtained between different traits was similar in direction, while in magnitude, the genotypic correlations were higher than the corresponding phenotypic correlations.
Through the above data, the correlation coefficients between the color parameters and their polar components were calculated.
An additional variation that can be introduced is the elimination of the only positive correlation coefficient that we have obtained (which relates morphological and syntactic complexity), provided that its sign is counterintuitive and its absolute value (r = 0.
A significant positive correlation was found with the correlation coefficient being 0.
The data was entered into an Excel[R] spreadsheet and analyzed using a correlation coefficient data analysis tool pack included in the software.