Birla Institute of Technology & Science, Pilani Distance Learning Programmes Division Second Semester 2006-2007 Mid-Semester Test (EC-1 Regular) Course No. : IS ZC415 Course Title : DATA MINING Nature of Exam : Closed Book Weightage : 40% Duration : 2 Hours Date of Exam : 03/02/2007 (AN) Note: 1.Please follow all the Instructions to Candidatesgiven on the cover page of the answer book. 2.All parts of a question should be answered consecutively. Each answer should start from a fresh page. 3.Mobile phones and computers of any kind should not be brought inside the examination hall. 4.Use of any unfair means will result in severe disciplinary action. Q.1.Describe why concept hierarchies are important in data mining. (4) Q.2.Give one innovative example where the study of outliers is useful. Also propose some method to detect outliers. (4) Q.3.Suppose a group of 12 sales price records has been sorted as follows: 5, 10, 11, 13, 15, 35, 50, 55, 72, 92, 204, 215 (a)Partition them into three bins using equal width partitioning.
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