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  • 2022-05-26 16:46:05 发布

当代市场调研10E全套配套课件中英文PPTch17.ppt

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ChapterSeventeen17-1 BivariateAnalysisofAssociationBivariateTechniques:Statisticalmethodsofanalyzingtherelationshipbetweentwovariables.IndependentVariable:Variablebelievedtoaffectthevalueofthedependentvariable.17-2KeyTerms&Definitions DependentVariable:Variableexpectedtobeexplainedorcausedbytheindependentvariable.BivariateRegressionAnalysis:Theanalysisofthestrengthofthelinearrelationshipbetweenvariableswhenoneisconsideredtheindependentvariableandtheotheristhedependentvariable.BivariateAnalysisofAssociation17-3KeyTerms&Definitions ScatterDiagramScatterDiagram:GraphicplotofthedatawithdependentvariableontheY(vertical)axisandtheindependentvariableontheX(horizontal)axis.Showsthenatureoftherelationshipbetweenthetwovariables,linearornonlinear.17-4KeyTerms&Definitions TypesofRelationshipsFoundinScatterDiagrams17-5KeyTerms&Definitions TypesofRelationshipsFoundinScatterDiagrams17-6KeyTerms&Definitions Valuesfor“a”and“b”canbecalculatedasfollows:Least-SquaresEstimationProcedure17-7KeyTerms&Definitions Least-SquaresEstimationProcedureTheleast-squaresprocedureisafairlysimplemathematicaltechniquethatcanbeusedtofitdataforXandYtoalinethatbestrepresentstherelationshipbetweenthetwovariables.17-8KeyTerms&Definitions Least-SquaresEstimationProcedureTheleast-squaresprocedureisafairlysimplemathematicaltechniquethatcanbeusedtofitdataforXandYtoalinethatbestrepresentstherelationshipbetweenthetwovariables.17-9KeyTerms&Definitions CoefficientofDetermination17-10KeyTerms&Definitions CoefficientofDetermination17-11KeyTerms&Definitions CoefficientofDetermination17-12KeyTerms&Definitions StatisticalSignificanceofRegressionResults17-13KeyTerms&Definitions StatisticalSignificanceofRegressionResults17-14KeyTerms&Definitions ErrorSumsofSquares(SSE)SumofSquaresDuetoRegressionVariationnotexplainedbytheregression.Instudyingtherelationshipbetweenvehiculartrafficandsales,thecoefficientofdeterminationmaybeusedtomeasurethepercentofthetotalvariation.17-15KeyTerms&Definitions HypothesesConcerningOverallRegressionHerewe,astheresearchers,areinterestedinhypothesesregardingthecomputedR2valuefortheproblem.Istheamountofvarianceexplainedintheresult(byourmodel)significantlygreaterthanwewouldexpectduetochance?17-16KeyTerms&Definitions DonotnecessarilymeanthereisacausalrelationshipbetweenvariablesCouldsimplyrepresentcoincidencebetweentherelevantvariablesShouldbetakenincontextandwiththetimelinessofbothdatasetsinmindCanbeusedinconjunctionwithcrosstabulationsoftherelevantdatatoaddanotherperspectivetotheresultsKeyPoints:17-17KeyTerms&DefinitionsMeasuresofAssociationCommonMisapplications 17-18KeyTerms&DefinitionsStatisticsontheInternetBivariateTechniquesScatterDiagramIndependentVariableDependentVariableBivariateRegressionAnalysisCoefficientofDeterminationLeast-SquareEstimationProcedureMeasuresofAssociation–TheConceptsSumofSquaresDuetoRegressionErrorSumofSquaresLinksandbuttonareactivewhenin“SlideShowMode”KeyTerms&Definitions

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