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Business Intelligence and Data Mining by Anil Maheshwari

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CHAPTER 5

Decision Trees

Decision trees are a simple way to guide one’s path to a decision. The decision may be a simple binary one, whether to approve a loan or not. Or it may be a complex multivalued decision, as to what may be the diagnosis for a particular sickness. Decision trees are hierarchically branched structures that help one come to a decision based on asking certain questions in a particular sequence. Decision trees are one of the most widely used techniques for classification. A good decision tree should be short and ask only a few meaningful questions. They are very efficient to use, easy to explain, and their classification accuracy is competitive with other methods. Decision trees can generate knowledge from a few test instances ...

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