English to Chinese Tech/Engineering IT (Information Technology) Java Data Mining

In this example, we are more interested to know about the customers who are likely to attrite, so the Attriter value is considered the positive target value—the value we are interested in predicting. The positive target value is necessary when computing lift and the ROC test metric.
http://www.javaworld.com/javaworld/jw-02-2007/jw-02-jdm.html
参阅该链接最后一段。