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 ?
Among them, the highest correlation coefficients with the field emergence and germination were observed in the second day germination in cool test, except for the laboratory emergence.
Next factors F2, F3 and F4 can be explained analogously, but they contain much lower number of characteristics and correlation coefficients inside each factor.
Correlation coefficient is an important decision making apparatus in statistics to evaluate the relation between two sets.
In order to analyze the difference in the degree of influence, the correlation coefficient between PSV and D or [R.sub.q] in the interval of different polishing cycles were calculated with Pearson correlation analysis.
Figure 6 shows mean latent heat flux over China during summer and winter from simulation and reanalysis while Table 5 shows the bias, RMSE, and correlation coefficients in each zone.
For example, we could double the size of all the observations made using one of the methods without altering the correlation coefficient. The question was not whether the 2 methods agreed but rather how closely they agreed, as the differences between the pairs of measurements would be much more informative.
The development of the UK HPI since 2000 (Figure 1, Appendix) shows an almost parallel trend to WAP, with a correlation coefficient of 0.835.
Despite this application, the simple correlation coefficient does not necessarily represent a cause-effect relationship between the traits; i.e., the fact that both increase or are inversely proportional does not mean one trait is affecting another.
In general genotypic correlation coefficients were higher in magnitude than the corresponding phenotypic correlation coefficients which might be due to masking or modifying effect between these characters.
In the form rP for the phenotypic correlation coefficient of x and y; rg for the genetic correlation coefficient; re for the environmental correlation coefficient; Hxy for the correlative heritability of trait x and y; H 2 for the heritability.The relative efficiency of indirect selection (CRy/Ry) (Zhao et al., 2005) is calculated by the following formula:
The correlation coefficients obtained between the Luminosity (L*) and the other parameters within the contaminated Annona Muricata are shown in

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