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correlation
(redirected from coefficient of correlation)

   Also found in: Dictionary/thesaurus, Medical, Financial, Wikipedia, Hutchinson 0.07 sec.

correlation

In statistics, the degree of association between two random variables. The correlation between the graphs of two data sets is the degree to which they resemble each other. However, correlation is not the same as causation, and even a very close correlation may be no more than a coincidence. Mathematically, a correlation is expressed by a correlation coefficient that ranges from −1 (never occur together), through 0 (absolutely independent), to 1 (always occur together).


In statistics, a measure of the strength of the relationship between two variables. It is used to predict the value of one variable given the value of the other. For example, a correlation might relate distance from urban location to gasoline consumption. Expressed on a scale from -1.0 to +1.0, the strongest correlations are at both extremes and provide the best predictions. See regression analysis.


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The correlation coefficient between storage energy and loss energy obtained using both the mentioned testers were calculated and the coefficient of correlation value was found to be 0.
To examine the above hypotheses, the following statistics were computed: 1) coefficient of correlation between variables of interest; 2) DP coefficient, the difference between the mean item scores made by the top 27% and the bottom 27% of respondents in terms of total scale score; 3) t-ratio of the DP coefficient; 4) frequency of response to each alternative for each item; and 5) the Cronbach alpha.
p] = confidence interval based on double sampling error; Coefficient of correlation was r = 0.
 
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