Programming the statistical procedures from SAS

How to make more sense of the modeling ?

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Contributor Ivy
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Posts: 73

How to make more sense of the modeling ?

[ Edited ]

Dear all, 

 

I am modeling a logistic regression model , with 14 explaination varibles , and 50,000 records.  

 

Model fitting result:

 

All 14 variables are significant.

 

R-Square =  0.1927

 

Hosmer and Lemeshow Goodness-of-Fit Test

Chi-Square DF Pr > ChiSq

374.8494 8 <.0001

 

We can see the model only explain 19.27%  of the data.  Is this model useful at all ?   

 

Thank you,

Ivy  

Grand Advisor
Posts: 16,889

Re: How to make more sense of the modeling ?

R squared isn't a good measure of model accuracy for LOGISTIC regression. 

There is a pseudo-R squared value and other metrics that are more important. The documentation has examples or google search for evaluating LOGISTIC regression models. 

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