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Dear All,
Can someone help me with the following output while building a mode
using logistic regression:
Association of Predicted Probabilities and Observed Responses
Percent Concordant 66.5 Somers' D 0.335
Percent Discordant 32.9 Gamma 0.337
Percent Tied 0.6 Tau-a 0.115
Pairs 497522982 c 0.668
I want to understand the concept, and use of this statistic and how is
this calculated?
Regards.
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