I need to do a formal report with the results of a decision tree classifier developed in SPSS, but I don't know how. I know there are really well defined ways to report statistics such as mean and standard deviation (e.g., M = 19.22, SD = 3.45) or correlations (e.g., r(55) = .49, p < .01), but I cant find a standard for decision trees. I have statistics such as predicted/observed accuracy percentage, risk estimate (resubstitution and cross validation), and standard error. Do I need other or these are enough? How should I show them?