Correlation Coefficient 3
Correlation Coefficient 3 : Natural Disaster. A measure of association that indicates the degree to which two or more sets of observations fit a linear relationship. This coefficient, represented by the letter r, can vary between + 1 and _1. If r = + 1, there is a perfect linear relationship in which one variable varies directly with the other. If r = _1, there is again a perfect linear association, but one variable varies inversely with the other. [Last, 1983: A Dictionary of Epidemiology]
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