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nac
nac
Level III

Multivariate vs. Graph builder

Hi,

When I try to find correlation between Age and Height  by using multivariate analysis R2=0.9807

When I apply the same thing by using Graph Builder R2=0.962

 

What is the reason of this change. This difference will be increase based on results.

 

Could someone help on this?

 

You can also see jmp file on enclosed.

 

 

 

2 REPLIES 2
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Re: Multivariate vs. Graph builder

I verified the Pearson linear correlation coefficient = 0.9807 from Multivariate with Bivariate and by hand. I do not know how the estimate provided by Graph Builder is calculated. You might send this example to JMP Technical Support (support@jmp.com) for investigation. Please report here what you learn.

Learn it once, use it forever!
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Re: Multivariate vs. Graph builder

I think you are confusing the Pearson correlation coefficient (r) with the Coefficient of Determination (RSquare). 

From Fit Y by X, Multivariate, AND Graph Builder, I get the same value for r, which is -0.981. I have included the Graph Builder report that shows this in the upper-left of the graph.

GraphBuilder.JPG

 

If I fit a linear regression line to the data I get an RSquare of 0.962 from both Graph Builder and Fit Y by X.

FitYbyXRSquare.JPG

 

Graph Builder report for RSquare.

GBRSquare.JPG

Dan Obermiller
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