Multiple R and R squared

[preppie]

Keep forgetting….what is multiple R?

 

[Pitmaster1]

When you square it => (multiple R)^2 = R^2 - this is meassure how the independent variables explain the dependant variable.

 

[preppie]

thx pitmaster1. that was helpful.

 

[Straightjacket]

I think you inversed the relationship.
Multiple R is the correlation between actual and predicted values of the dependant variable.
R2 is the model’s accuracy in explaining the dependant variable.
I think there is a testable difference.

 

[preppie]

Yes, that sounds right. thx straightjacket.

 

[Pitmaster1]

thx straightjacket for correction.
This meassure is of course also useful for multiple regression.
For exam purposes you need to know one thing : (multiple R)^2 = R^2