hypothesis testing4 contingency tables假设检验列联表.pptx

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hypothesis testing4 contingency tables假设检验列联表.pptx

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IBMProcessInnovation

TechnicalStrategy

Presents

TechnicalStrategyRoadmapStatus2InvestigateopportunitiestoexpandthetechnicalskillsandtoolsofthePIteamCreatecomprehensivesetofmaterialstoeducateandassistthePIBlackBeltsandGreenBeltsinprocessimprovementtoolsandmethodsResearchIndustrybestpracticestoensurePIBBsareabreastwithlatestskills/toolsetTeamObjectivesTeamMembersBrettDuarteColinMarshallseaEdAmentAlexGeorgeAmadoSaveedraCarlosJimenezHypothesisTesting

Momentsonstatisticalanalysis,asimileImaginethatyouareaCSIofficer,sortofamodernSherlockHolmes,andyouneedtogatherthedatafromacrimescene,yourcriminalisticinvestigationcouldtakethefollowingpattern:Step1.YouneedtohaveacompositesketchofthesuspectStep2.YouneedtosetupasearchingperimeterforsearchforthesuspectStep3.YouneedtocomparetheDNAofthesuspectwiththesamplesobservedinthecrimescene

EstablishingthehypothesisH0AleasdeclarathatTHEREISNOTDIFFERENCEIf?representsthepopulationmeanand?0representsthehypotheticalmean,then:H0:m=m0Example–THEREISNOTDIFFERENCEbetweengasconsumptionforthecarandtheprevioustripNullhypothesis–H0HAAlwaysoppositetoH0ItistrueifwefoundthatNULLHYPOTHESISISFALSE,thenHA:m?m0Example–ITDOESHAVEADIFFERENCEbetweengasconsumptionforthecarandtheprevioustripAlternatehypothesis–HA

BasicstatisticalhypothesistestFocusoftestComparegroupswitheachotherAACompareonegroupWithatargetFocusondatatypeDiscretevariableContinuousvariableClassificationofstatisticsCentraltendency1-ProportionDataDistributionNormalSymmetricNotsymmetricNon-normal(shape)1-SampleWilcoxon1-SampleSigntest1-Samplet

BasicstatisticalhypothesistestNumberofgroupsComparemoreThan2groupsBAComparegroupswitheachotherComparetwogroupsDatatypeContinuousvariableDiscretevariable2-ProportionsPairedtDataDistributionNormalNon-Norma