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12:14 Jan 11, 2008
English to Spanish translations [PRO] Tech/Engineering - Mathematics & Statistics
English term or phrase:misclassification
This fact can cause higher misclassification rates in under-represented groups (see Prior Probabilities and Misclassification Costs below).
Prior Probabilities and Misclassification Costs
When non-uniform misclassification costs are specified for the GC&RT analysis, the Gini measure is modified to account for these costs (p. 113):
where C ( i | j ) is the cost of misclassifying an observation in class j as belonging to class i. This feature enables the user to effectively penalize certain types of misclassifications in the analysis. However, as noted above in Prior Probabilities and the Gini Measure of Node Impurity, p ( j | t ) is a function of p ( j ), the prior probability for class j. Therefore, for a given C ( i | j ) and p ( j ), one can find C ' ( i | j ) and p ' ( j ) , such that