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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. the interval from the beginning of the P wave to the beginning of the QRS complex on an electrocardiogram. It represents the atrioventricular conduction time, which normally is between 0.12 and 0.20 second.