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 ?
Results demonstrated that impaired driving behaviors reported on the IDA have good test-retest (N=41) and interrater (N=40) reliability, with Pearson correlation coefficients ranging from r = .
Because the residuals obtained from estimating Equation 1 are one-step-ahead forecast errors, the results discussed in this section could be called results for one-step-ahead forecast errors, but here they are referred to simply as the correlation coefficient.
For each population, I also calculated correlation coefficients between the number of disability-adjusted life-years from each cause and the number of publications on that cause in each of the four sources in Clinical Chemistry.
In all cases, the correlation coefficients were significant at the 1 percent level.
1) Pearson's sample correlation coefficient, let's denote it by [r.
The following procedure determines this correlation coefficient and decides whether it is significant or not.
Table 2 shows correlation coefficient values calculated for each interval, for each of the three Dow Jones Averages, for lags 40 to 100, and for lags 40 to 200.
It can be seen that most of the correlation coefficients are close to one.
For 41% districts correlation coefficient pattern is like D1>D2>D3.
As the value of the correlation coefficient increases and becomes more realistic, it is no truer: the gap between the two extremes curves increases.
Relative to cognitive and somatic state anxiety, the ARS-2 still exhibits the highest correlations with CSAI-2 subscales, but in the case of self-confidence, the original version of the ARS yielded the highest correlation coefficient.
The simple correlation coefficient bilateral (two-tail) Talent management Organizational Commitment Pearson's correlation coefficient 0.