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hi folks greetings, I have done a survey,i am using spss and doing binary logistic regression i have almost 100 questions and so have developed a few models how can i choose that which model is good is it the accuracy, have to select one model among all these, now about making a decision should i decide on accuracy, sensitivity, specivity, area under ROC curve or any other criteria that you think is appropriate.what about CHAID and Tree methods should i try those also. any idea about hosmer lemeshow method thanks Dr khiz You may leave the list at any time by sending the command SIGNOFF allstat to [log in to unmask], leaving the subject line blank.