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Leakage in Data Mining: Formulation, Detection, and …
www.cs.umb.eduto each page-view record at the end of the session. A solution is to replace this attribute with "page number in session" which de-scribes the session length up to the current page, where prediction is required. Subsequent work by Kohavi . et al. [3] presents the common busi-ness analysis problem of characterizing big spenders among cus-tomers.