数据挖掘导论习题答案

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1、IntroductiontoDataMiningInstructor’sSolutionManualPang-NingTanMichaelSteinbachVipinKumarCopyright
c2006PearsonAddison-Wesley.Allrightsreserved.Contents1Introduction12Data53ExploringData194Classification:BasicConcepts,DecisionTrees,andModelEvaluation255Classification:Alter

2、nativeTechniques456AssociationAnalysis:BasicConceptsandAlgorithms717AssociationAnalysis:AdvancedConcepts958ClusterAnalysis:BasicConceptsandAlgorithms1259ClusterAnalysis:AdditionalIssuesandAlgorithms14710AnomalyDetection157iii1Introduction1.Discusswhetherornoteachofthefo

3、llowingactivitiesisadataminingtask.(a)Dividingthecustomersofacompanyaccordingtotheirgender.No.Thisisasimpledatabasequery.(b)Dividingthecustomersofacompanyaccordingtotheirprof-itability.No.Thisisanaccountingcalculation,followedbytheapplica-tionofathreshold.However,predic

4、tingtheprofitabilityofanewcustomerwouldbedatamining.(c)Computingthetotalsalesofacompany.No.Again,thisissimpleaccounting.(d)Sortingastudentdatabasebasedonstudentidentificationnum-bers.No.Again,thisisasimpledatabasequery.(e)Predictingtheoutcomesoftossinga(fair)pairofdice.No

5、.Sincethedieisfair,thisisaprobabilitycalculation.Ifthediewerenotfair,andweneededtoestimatetheprobabilitiesofeachoutcomefromthedata,thenthisismoreliketheproblemsconsideredbydatamining.However,inthisspecificcase,solu-tionstothisproblemweredevelopedbymathematiciansalongtime

6、ago,andthus,wewouldn’tconsiderittobedatamining.(f)Predictingthefuturestockpriceofacompanyusinghistoricalrecords.Yes.Wewouldattempttocreateamodelthatcanpredictthecontinuousvalueofthestockprice.Thisisanexampleofthe2Chapter1Introductionareaofdataminingknownaspredictivemode

7、lling.Wecoulduseregressionforthismodelling,althoughresearchersinmanyfieldshavedevelopedawidevarietyoftechniquesforpredictingtimeseries.(g)Monitoringtheheartrateofapatientforabnormalities.Yes.Wewouldbuildamodelofthenormalbehaviorofheartrateandraiseanalarmwhenanunusualhear

8、tbehavioroccurred.Thiswouldinvolvetheareaofdataminingknownasanomalyde-tection.Thiscouldalsobeconsideredasaclas