《数据挖掘导论》课后习题答案

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1、IntroductiontoDataMiningInstructor’sSolutionManualPang-NingTanMichaelSteinbachVipinKumarCopyright
c2006PearsonAddison-Wesley.Allrightsreserved.Contents1Introduction12Data53ExploringData194Classification:BasicConcepts,DecisionTrees,andModelEvaluation255Classifica

2、tion:AlternativeTechniques456AssociationAnalysis:BasicConceptsandAlgorithms717AssociationAnalysis:AdvancedConcepts958ClusterAnalysis:BasicConceptsandAlgorithms1259ClusterAnalysis:AdditionalIssuesandAlgorithms14710AnomalyDetection157iii1Introduction1.Discusswhe

3、therornoteachofthefollowingactivitiesisadataminingtask.(a)Dividingthecustomersofacompanyaccordingtotheirgender.No.Thisisasimpledatabasequery.(b)Dividingthecustomersofacompanyaccordingtotheirprof-itability.No.Thisisanaccountingcalculation,followedbytheapplica-t

4、ionofathreshold.However,predictingtheprofitabilityofanewcustomerwouldbedatamining.(c)Computingthetotalsalesofacompany.No.Again,thisissimpleaccounting.(d)Sortingastudentdatabasebasedonstudentidentificationnum-bers.No.Again,thisisasimpledatabasequery.(e)Predicting

5、theoutcomesoftossinga(fair)pairofdice.No.Sincethedieisfair,thisisaprobabilitycalculation.Ifthediewerenotfair,andweneededtoestimatetheprobabilitiesofeachoutcomefromthedata,thenthisismoreliketheproblemsconsideredbydatamining.However,inthisspecificcase,solu-tionst

6、othisproblemweredevelopedbymathematiciansalongtimeago,andthus,wewouldn’tconsiderittobedatamining.(f)Predictingthefuturestockpriceofacompanyusinghistoricalrecords.Yes.Wewouldattempttocreateamodelthatcanpredictthecontinuousvalueofthestockprice.Thisisanexampleoft

7、he2Chapter1Introductionareaofdataminingknownaspredictivemodelling.Wecoulduseregressionforthismodelling,althoughresearchersinmanyfieldshavedevelopedawidevarietyoftechniquesforpredictingtimeseries.(g)Monitoringtheheartrateofapatientforabnormalities.Yes.Wewouldbui

8、ldamodelofthenormalbehaviorofheartrateandraiseanalarmwhenanunusualheartbehavioroccurred.Thiswouldinvolvetheareaofdataminingknownasanomalyde-tection.Thiscouldalsobeconsideredasaclas