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I think you inversed the relationship. Multiple R is the correlation between actual and predicted values of the dependant variable. R2 is the modelâs accuracy in explaining the dependant variable. I think there is a testable difference.
P-R interval. In the electrocardiogram, the period between the onset of the P wave and the beginning of the QRS complex. See also: interval. interval. the space between two objects or parts; the lapse of time between two events. In statistical terms, the numerical distance between two values.