商務(wù)統(tǒng)計(jì)-知到答案、智慧樹答案緒論單元測試1、問題：PennyBauer,ChiefFinancialOfficerofHarrisonHaulage,suspectsirregularitiesinthepayrollsystem,andordersaninspectionof‘eachandeverypayrollvoucherissuedsince1January2005’.Fiveperc選項(xiàng)：A:descriptivestatisticsB:nonparametricstatisticsC:nominaldataD:inferentialstatistics答案:【descriptivestatistics】第一章單元測試1、問題：MichaelBayley,MarketingDirectorofUniPower’sElectricalDivision,isleadingastudytoidentifyandassesstherelativeimportanceofproductfeatures.Michaeldirectshisstafftodesignasurveyques選項(xiàng)：A:sampleB:parameterC:statisticD:population答案:【population】2、問題：ClaudiaTaylor,DirectorofGlobalIndustrialSalesinMelbourne,isconcernedbyadeterioratingsalestrend.Specifically,thenumberofcustomersisstableat1500buttheyarepurchasinglesseachyear.S選項(xiàng)：A:statisticB:populationC:parameterD:sample答案:【sample】3、問題：Apoliticianwhoisrunningfortheofficeofpremierinastatewith3millionregisteredvoterscommissionsasurvey.Inthesurvey,53.6%ofthe5000registeredvotersinterviewedsaytheyplantovoteforhim選項(xiàng)：A:46.4%of,or2320,votersinterviewedwhoplannottovoteforhimB:53.6%of,or2680,votersinterviewedwhoplantovoteforhimC:5000registeredvotersinterviewed.D:3millionregisteredvotersinthestate.答案:【3millionregisteredvotersinthestate.】4、問題：SimonArnett,DirectorofHumanResources,isexploringthecausesofemployeeabsenteeismatBuderimBottlingduringthelastoperatingyear(1January2005to31December2005).Theaveragenum選項(xiàng)：A:sampleB:populationC:parameterD:statistic答案:【parameter】5、問題：Asummarymeasurethatiscomputedfromasampletodescribeacharacteristicofthepopulationiscalled選項(xiàng)：A:astatisticB:aparameterC:BothAandCarecorrect,sincetheyarethesameD:apopulation答案:【astatistic】6、問題：SimonArnett,DirectorofHumanResources,isexploringthecausesofemployeeabsenteeismatBuderimBottlingduringthelastoperatingyear(1January2005to31December2005).Personnelrecord(Theplantemploys250.)Forthisstudy,theaveragenumberdaysabsentforthese50employeesisa________________.選項(xiàng)：A:populationB:sampleC:statisticD:parameter答案:【statistic】7、問題：Descriptivestatisticsdealswithmethodsof選項(xiàng)：A:doingalloftheaboveB:summarisingdataC:presentingdatainaconvenientandinformativewayD:organisingdata.答案:【doingalloftheabove】8、問題：Whichofthefollowingstatementsisnottrue?選項(xiàng)：A:StatisticalinferenceisusedtodrawconclusionsorinferencesaboutcharacteristicsofpopulationsbasedonsampledataB:OneformofdescriptivestatisticsusesnumericaltechniquesC:Inthelanguageofstatistics,thetermpopulationreferstoagroupofpeopleD:Oneformofdescriptivestatisticsusesgraphicaltechniques答案:【Inthelanguageofstatistics,thetermpopulationreferstoagroupofpeople】9、問題：Astudentachievesan82onthefirsttestinastatisticscourse.Fromthis,sheassumesthatheraverageattheendofthesemester(afterothertests)willbeabout82.Thisisanexampleof__________________選項(xiàng)：A:nonparametricstatisticsB:descriptivestatisticsC:inferentialstatisticsD:wishfulthinking答案:【inferentialstatistics】10、問題：Whichofthefollowingisnotthegoalofdescriptivestatistics?選項(xiàng)：A:SummarisingdataB:EstimatingcharacteristicsofthepopulationC:DisplayingaspectsofthecollecteddataD:Reportingnumericalfindings答案:【Estimatingcharacteristicsofthepopulation】第二章單元測試1、問題：Ifdataaregroupedintointervalsandthenumberofitemsineachgroupislisted,thiscouldbecalleda_______________.選項(xiàng)：A:frequencydistributionB:ogiveC:histogramD:stemandleafplot答案:【histogram】2、問題：Iftheindividualclassfrequencyisdividedbythetotalfrequency,theresultisthe__________.選項(xiàng)：A:stemandleafplotB:relativefrequencyC:midpointfrequencyD:cumulativefrequency答案:【relativefrequency】3、問題：Acumulativefrequencypolygonisalsocalled_______________.選項(xiàng)：A:afrequencypolygonB:astemandleafplotC:anogiveD:ahistogram答案:【anogive】4、問題：Thenumberofclassintervalsinafrequencydistributionisusuallybetween___________.選項(xiàng)：A:3and5B:1and25C:7and9D:5and15答案:【5and15】5、問題：Oneadvantageofastemandleafplotoverafrequencydistributionisthat__________.選項(xiàng)：A:theclassmidpointsareusedastheleafB:theclassmidpointsareusedasthestemC:itcontainsmoreclassintervalsD:thevaluesoftheoriginaldataareretained答案:【thevaluesoftheoriginaldataareretained】6、問題：Onerulethatmustalwaysbefollowedinconstructingfrequencydistributionsisthat________.選項(xiàng)：A:eachdatapointcanonlyfallintooneclassB:thewidthofeachclassisequaltotherangeC:thenumberofclassesmustbelessthan10D:thenumberofintervalsmustbeanoddnumber答案:【eachdatapointcanonlyfallintooneclass】7、問題：Whichofthefollowingisbesttoshowthepercentageofatotalbudgetthatisspentoneachcategoryofitems?選項(xiàng)：A:histogramB:ogiveC:stemandleafchartD:piechart答案:【piechart】8、問題：Acumulativefrequencydistributionwouldprovide_____________.選項(xiàng)：A:arunningtotalofthefrequenciesintheclassesB:theproportionofthetotalfrequencieswhichfallintoeachclassC:averycloudypictureofthefrequenciesD:agraphofafrequencydistribution答案:【arunningtotalofthefrequenciesintheclasses】9、問題：Thenumberofphonecallsarrivingataswitchboardeachhourhasbeenrecordedandthefollowingfrequencydistributionhasbeendeveloped.ClassIntervalFrequency20-under403040-under604560-under808080-under10045Whatisthecumulativefrequencyofthethirdclass?選項(xiàng)：A:75B:80C:0.40D:155答案:【155】10、問題：Thenumberofphonecallsarrivingataswitchboardeachhourhasbeenrecordedandthefollowingfrequencydistributionhasbeendeveloped.ClassIntervalFrequency20-under403040-under604560-under808080-under10045Whatistheapproximaterangeofthenumberofphonecallsarrivingeachhour?選項(xiàng)：A:20B:200C:100D:80答案:【80】第三章單元測試1、問題：SimonArnett,DirectorofHumanResources,isexploringemployeeabsenteeismattheBuderimBottlingduringthelastoperatingyear.Asampleofsixpersonnelrecordsproducedthefollowingdata:0,2選項(xiàng)：A:3.41C:9.67答案:【】2、問題：JessicaSalas,ManagingDirectorofSalasProducts,isreviewingthewarrantypolicyforhercompany’snewmodelofcarbatteries.Lifetestsperformedonasampleof100batteriesindicated:(1)anaveragelifeof75months,(2)astandarddeviationof5months,and(3)batterylifeisapproximatelynormallydistributed.Approximately68%ofthebatterieswilllastbetween________________.選項(xiàng)：A:60and90monthsB:65and85monthsC:55and95monthsD:70and80months答案:【70and80months】3、問題：Theaveragestartingsalaryforgraduatesatauniversityis$25,000withastandarddeviationof$2000.AhistogramofthedatashowstheshapetobeveryerraticsoChebyshev’sTheoremshouldbeused.Ho選項(xiàng)：A:atleast75%B:atleast89%C:atleast68%D:atleast95%答案:【atleast75%】4、問題：Thesamplestandarddeviationisfoundbytakingthesquarerootof_______.選項(xiàng)：A:thesamplevarianceB:thecoefficientofvariationC:thesamplemeanD:themeanabsolutedeviation答案:【thesamplevariance】5、問題：Thenumberofstandarddeviationsthatavalue(X)isaboveorbelowthemeanisthe_______.選項(xiàng)：A:interquartilerangeB:absolutedeviationC:coefficientofvariationD:Zscore答案:【Zscore】6、問題：Inahistogram,theproportionofthetotalareathatmustbetotheleftofthemedianis（）選項(xiàng)：A:exactly0.50.B:lessthan0.50ifthedistributionisskewedtotheleftC:morethan0.50ifthedistributionisskewedtotherightD:between0.25and0.60ifthedistributionissymmetricandunimodal答案:【exactly0.50.】7、問題：WhichofthefollowingisNOTameasureofcentraltendency?選項(xiàng)：A:modeB:medianC:varianceD:mean答案:【variance】8、問題：Anothertermforaverageis____________.選項(xiàng)：A:meanB:modeC:medianD:variance答案:【mean】9、問題：Ifthemeanofadistributionisgreaterthanthemedian,thenthedistributionis____________.選項(xiàng)：A:symmetricalaboutitsmeanB:skewedtotherightC:skewedtotheleftD:notskewed答案:【skewedtotheright】10、問題：Themeanisnotaffectedbytheextremevalues.選項(xiàng)：A:錯B:對答案:【錯】第四章單元測試1、問題：Aprocessthatproducesoutcomesiscalled_______.選項(xiàng)：A:aneventB:aresultC:anexperimentD:populationequivalent答案:【anexperiment】2、問題：WhichofthefollowingisNOTalegitimateprobabilityvalue?選項(xiàng)：A:15/16B:0.23C:0.67D:4/3答案:【4/3】3、問題：Anoutcomeofanexperimentiscalled_______.選項(xiàng)：A:aneventB:aprobabilityC:acomplementD:apriorielements答案:【anevent】4、問題：Thelistofallelementaryeventsforanexperimentiscalled_______.選項(xiàng)：A:theexhaustivelistB:thepopulationspaceC:thesamplespaceD:theeventunion答案:【thesamplespace】5、問題：IfAandBaremutuallyexclusiveeventswithP(A)=0.70,thenP(B)：（）選項(xiàng)：A:cantakeanyvaluebetween0and0.70B:cannotbedeterminedfromtheinformationgivenC:cannotbelargerthan0.30D:cantakeanyvaluebetween0and1答案:【cannotbelargerthan0.30】6、問題：IfaneventisinsetXbutisnotinsetY,whichofthefollowingistrue?選項(xiàng)：A:itisinboththeunionandintersectionofXandYB:itisintheunionofXandYC:itisintheintersectionofXandYD:itisnotintheunionofXandY答案:【itisintheunionofXandY】7、問題：Iftheoccurrenceofoneeventdoesnotaffecttheoccurrenceofanotherevent,thenthetwoeventsare_______.選項(xiàng)：A:independentB:mutuallyexclusiveC:elementaryeventsD:complements答案:【independent】8、問題：LetAbetheeventthatastudentisenrolledinanaccountingcourse,andletSbetheeventthatastudentisenrolledinastatisticscourse.Itisknownthat30%ofallstudentsareenrolledinanaccountingcoursean選項(xiàng)：A:0.15B:0.40C:0.30D:0.55答案:【0.40】9、問題：GivenP(A)=0.40,P(B)=0.50,P(AB)=0.15.Whichofthefollowingistrue?選項(xiàng)：A:AandBaremutuallyexclusiveB:AandBarenotindependentC:AandBareindependentD:AandBarecollectivelyexhaustive答案:【AandBarenotindependent】10、問題：MeaganDaviesmanagesaportfolioof200commonstocks.Herstaffclassifiedtheportfoliostocksby‘industrysector’and‘investmentobjective’.InvestmentIndustrySectorObjectiveElectronicsAirlinesHealthcareTotalGrowth1001040150Income20201050Total1203050200WhichofthefollowingisNOTtrue?選項(xiàng)：A:ElectronicsandGrowtharedependent.B:GrowthandIncomearecomplementaryevents.C:AirlinesandHealthcarearecollectivelyexhaustive.D:ElectronicsandHealthcarearemutuallyexclusive.答案:【AirlinesandHealthcarearecollectivelyexhaustive.】第五章單元測試1、問題：Variableswhichtakeonvaluesonlyatcertainpointsoveragivenintervalarecalled_______.選項(xiàng)：A:continuousrandomvariablesB:valuevariablesC:discreterandomvariablesD:pointvariables答案:【discreterandomvariables】2、問題：Avariablethatcantakeonvaluesatanypointoveragivenintervaliscalled_______.選項(xiàng)：A:acontinuousrandomvariableB:adiscreterandomvariableC:avaluevariableD:apointvariable答案:【acontinuousrandomvariable】3$、問題：Youareofferedaninvestmentopportunity.Itsoutcomesandprobabilitiesarepresentedinthefollowingtable.XP(X)–1000.40$0.20+$1000.40Themeanofthisdistributionis_____________.選項(xiàng)：A:–$400B:$400C:$200D:$0答案:【$0】4$、問題：Youareofferedaninvestmentopportunity.Itsoutcomesandprobabilitiesarepresentedinthefollowingtable.XP(X)–1000.40$0.20+$1000.40Thestandarddeviationofthisdistributionis_____________.選項(xiàng)：A:$800,000B:$894C:$663D:–$400答案:【$894】5、問題：Thelong-runaverageormeanofaPoissondistributionisusuallyreferredtoas_______.選項(xiàng)：A:sB:mC:lD:a答案:【l】6、問題：ThevarianceofaPoissondistributionisequalto_______.選項(xiàng)：A:l/2B:C:lD:l2答案:【l】7、問題：IfXisabinomialrandomwithn=8andp=0.6,whatistheprobabilitythatXislessthanorequalto2?選項(xiàng)：A:0.009B:0.050C:0.041D:0.375答案:【0.050】8、問題：IfXisabinomialrandomwithn=8andp=0.6,whatistheprobabilitythatXisgreaterthan2?選項(xiàng)：A:0.950B:0.991D:0.124答案:【0.950】9、問題：Twenty-fiveitemsaresampled.Eachofthesehasthesameprobabilityofbeingdefective.Theprobabilitythatexactly2ofthe25aredefectivecouldbestbefoundby_______.選項(xiàng)：A:usingthebinomialdistributionB:usingthePoissondistributionC:usingthenormaldistributionD:usingtheexponentialdistribution答案:【usingthebinomialdistribution】1$0、問題：Youareofferedaninvestmentopportunity.Itsoutcomesandprobabilitiesarepresentedinthefollowingtable.XP(X)–1000.40$0.20+$1000.40Whichofthefollowingstatementsistrue?選項(xiàng)：A:Thisdistributionisskewedtotheleft.B:Thisisabinomialdistribution.C:Thisdistributionisskewedtotheright.D:Thisdistributionissymmetric.答案:【Thisdistributionissymmetric.】第六章單元測試1、問題：Thenormaldistributionisanexampleof_______.選項(xiàng)：A:acontinuousdistributionB:anexponentialdistributionC:abimodaldistributionD:adiscretedistribution答案:【acontinuousdistribution】2、問題：Thetotalareaunderneathanynormalcurveis_______.選項(xiàng)：A:equaltothecoefficientofvariationB:equaltothemeanC:equaltothevarianceD:equalto1答案:【equalto1】3、問題：Theareatotheleftofthemeaninanynormaldistributionis_______.選項(xiàng)：A:equalto1B:equalto0.5C:equaltothemeanD:equaltothevariance答案:【equalto0.5】4、問題：Foranynormaldistribution,anyvaluelessthanthemeanwouldhavea_______.選項(xiàng)：A:negativeprobabilityofoccurringB:negativez-scoreC:negativevarianceD:positivez-score答案:【negativez-score】5、問題：Astandardisednormaldistributionhasthefollowingcharacteristics:選項(xiàng)：A:hemeanandvariancearebothequalto1B:themeanandvariancearebothequalto0C:themeanisequalto0andthevarianceisequalto1D:themeanisequaltothevariance答案:【themeanisequalto0andthevarianceisequalto1】6、問題：IfXisanormalrandomvariablewithmean80andstandarddeviation5,calculatethez-scoreifX=88.選項(xiàng)：A:-1.6B:1.8C:-1.8D:1.6答案:【1.6】7、問題：SupposeXisanormalrandomvariablewithmean60andstandarddeviation2.Az-scorewascalculatedforanumber,andthez-scoreis3.4.Whatisx?選項(xiàng)：A:56.6B:63.4C:66.8D:53.2答案:【66.8】8、問題：LetXbeanormalrandomvariablewithmean20andstandarddeviation4.FindP(16<X<22).選項(xiàng)：A:0.0328B:0.5328C:0.1498D:0.4672答案:【0.5328】9、問題：LetXbeanormalrandomvariablewithmean20andstandarddeviation4.The90thpercentileofXis____________.選項(xiàng)：A:26.579B:20.000C:22.698D:25.126答案:【25.126】10、問題：Az-scoreisthenumberof__________thatavalueisfromthemean.選項(xiàng)：A:unitsB:standarddeviationsC:milesD:variances答案:【standarddeviations】第七章單元測試1、問題：Asageneralrule,thenormaldistributionisusedtoapproximatethesamplingdistributionofthesamplemeanonlyif選項(xiàng)：A:thesamplesizenissufficientlylargeB:npandn(1–p)arebothgreaterthan5C:theunderlyingpopulationisnormalD:thesamplemeaniscloseto0.50.答案:【thesamplesizenissufficientlylarge】2、問題：TheeightemployeesoftheArtDepartmentandtheir‘yearsofexperience’arelistedinthefollowingtable.EmployeeABCDEFGHExperience(years)1021115748Ifasampleofthreeemployeesisselec選項(xiàng)：A:56B:512C:336D:64答案:【512】3、問題：Asamplingdistributionisadistributionof_______________.選項(xiàng)：A:asamplestatistic,suchas,B:apopulationparameter,suchas,μ.C:excessprofitstoselectedshareholders.D:apopulationattribute,suchas,employee’sage.答案:【asamplestatistic,suchas,】4、問題：Thestandarddeviationofasamplingdistributioniscommonlycalled_______.選項(xiàng)：A:thestandarderror.B:theuniformspread.C:statisticalmargin.D:statisticalleverage.答案:【】5、問題：Thecentrallimittheoremstatesthatifnislargeenough,thedistributionofthesamplemeansis_____________distributedregardlessoftheshapeofthepopulation.選項(xiàng)：A:approximatelynormallyB:nonrandomlyC:uniformlyD:randomly答案:【approximatelynormally】6、問題：Accordingtothecentrallimittheorem,themeanofthesamplemeansforagivensizeofsampleisequalto_______.選項(xiàng)：A:thepopulationmeanB:thepopulationmeandividedbythesquarerootofnC:zeroD:thepopulationmeandividedbyn答案:【thepopulationmean】7、問題：Increasingthesamplesizecausesthestandarderrorofthemeanto________.選項(xiàng)：A:decreaseinvalueB:destabiliseinvalueC:seekmarketequilibriumD:increaseinvalue答案:【decreaseinvalue】8、問題：Increasingthesamplesizecausesthesamplingdistributionofto________.選項(xiàng)：A:havelessdispersionB:shifttotheleftC:shifttotherightD:havemoredispersion答案:【havelessdispersion】9、問題：Supposeapopulationhasameanof90andastandarddeviationof28.Ifarandomsampleofsize49isdrawnfromthepopulation,theprobabilityofdrawingasamplewithameanofmorethan95is_______.選項(xiàng)：A:0.1056B:0.4286C:0.3944D:0.8944答案:【0.1056】10、問題：Suppose40%ofalluniversitystudentshaveacomputerathomeandasampleof64istaken.Whatistheprobabilitythatmorethan30ofthoseinthesamplehaveacomputerathome?選項(xiàng)：A:0.1314B:0.3686C:0.6314D:0.8686答案:【0.1314】第八章單元測試1、問題：Whenarangeofvaluesisusedtoestimateapopulationparameter,itiscalled_______.選項(xiàng)：A:anintervalestimateB:arangeestimateC:apointestimateD:astatisticalparameter答案:【anintervalestimate】2、問題：CatherineCho,DirectorofMarketingResearchatVitalglowPtyLtd,isevaluatingconsumeracceptanceofanewtoothpastepackage.Herstaffreportthat17%ofarandomsampleof200Darwinhouseho選項(xiàng)：A:astatisticalparameterB:anintervalestimateC:arangeestimateD:apointestimate答案:【apointestimate】3、問題：Thez-valueassociatedwithatwo-sided90%confidenceintervalis_______.選項(xiàng)：A:1.28B:1.96C:1.645D:2.575答案:【1.645】4、問題：Supposearandomsampleof36isselectedfromapopulationwithastandarddeviationof12.Ifthesamplemeanis98,the99%confidenceintervaltoestimatethepopulationmeanis_______.選項(xiàng)：A:92.85to103.15B:97.35to98.65C:94.08to101.92D:93.34to102.66答案:【93.34to102.66】5、問題：SamGates,MarketingDirectorofMansfieldMotors’ElectricalDivision,isleadingastudytoassesstherelativeimportanceofproductfeatures.Anitemonasurveyquestionnairedistributedto121MansEaseofMaintenanceMean7.5PopulationStandardDeviation1.1The90%confidenceintervalforthepopulationmeanratingof‘easeofmaintenance’is_____.選項(xiàng)：A:7.30to7.70B:7.34to7.66C:5.69to9.31D:5.34to9.66答案:【7.34to7.66】6、問題：Aresearcherwantstoestimatetheproportionofthepopulationwhichpossessagivencharacteristic.Arandomsampleofsize600istakenresultingin330itemswhichpossessthecharacteristic.Thepointe選項(xiàng)：A:0.60B:0.33C:0.55D:0.45答案:【0.55】7、問題：Thet-distributionissimilartoanormaldistribution.Howeverthet-distributionis_______.選項(xiàng)：A:bimodalB:discreteC:flatterD:notsymmetric答案:【flatter】8、問題：Inordertofindvaluesinthet-distributiontable,youmustconvertthesamplesizeorsizesto_______.選項(xiàng)：A:studentvaluesB:populationsizesC:degreesoffreedomD:z-values答案:【degreesoffreedom】9、問題：Ifthedegreesoffreedominat-distributionbecomeverylarge,_______.選項(xiàng)：A:thesamplesizemustbeverysmallB:thesamplemeanapproacheszeroC:thet-valuesandthez-valuesarealmostthesameD:thepopulationsizemustbeverylarge答案:【thet-valuesandthez-valuesarealmostthesame】10、問題：Infindingaconfidenceintervalforthepopulationmean,thepopulationstandarddeviationshouldbeusedifitisknown.Ifthepopulationstandarddeviationisnotknown,thenitshouldbeestimatedwith__選項(xiàng)：A:thesamplevarianceB:themeanC:thesamplestandarddeviationD:therange答案:【thesamplestandarddeviation】第九章單元測試1、問題：Thefirststepintestingahypothesisistoestablish_______.選項(xiàng)：A:apowerfunctionB:anindirecthypothesisC:anullhypothesisandalternativehypothesisD:anotrejectancehypothesisandarejectionhypothesis答案:【anullhypothesisandalternativehypothesis】2、問題：Considerthefollowingnullandalternativehypotheses.Ho:m<=7Ha:m>6Thesehypotheses_______________.選項(xiàng)：A:arenotcollectivelyexhaustiveB:areestablishedcorrectlyC:arenotmutuallyexclusiveD:donotreferenceapopulationparameter答案:【arenotmutuallyexclusive】3、問題：Considerthefollowingnullandalternativehypotheses.Ho:m>=7Ha:m<6Thesehypotheses_______________.選項(xiàng)：A:areestablishedcorrectlyB:donotreferenceapopulationparameterC:arenotcollectivelyexhaustiveD:arenotmutuallyexclusive答案:【arenotcollectivelyexhaustive】4、問題：Considerthefollowingnullandalternativehypotheses.Ho:￡352Ha:>352Thesehypotheses_______________.選項(xiàng)：A:areestablishedcorrectlyB:donotreferenceapopulationparameterC:arenotcollectivelyexhaustiveD:arenotmutuallyexclusive答案:【donotreferenceapopulationparameter】5、問題：Theregionofthedistributioninhypothesistestinginwhichthenullhypothesisisrejectediscalledthe_______.選項(xiàng)：A:alternativeregionB:nullregionC:rejectionregionD:notrejectanceregion答案:【rejectionregion】6、問題：Therejectionandnotrejectanceregionsaredividedbyapointcalledthe_______.選項(xiàng)：A:criticalvalueB:dividingpointC:rejectionvalueD:notrejectancevalue答案:【criticalvalue】7、問題：TheprobabilityofcommittingaTypeIIerrorisrepresentedby_______.選項(xiàng)：A:a/2B:aC:1–aD:b答案:【b】8、問題：JenniferCantu,CustomerServicesManageratTri-NationAutoInsurance,monitorstheclaimsprocessingtimeoftheclaimsdivision.Herstandardincludes‘a(chǎn)meanprocessingtimeof5daysorless’.Eachweek,herstaffchecksforcompliancebyanalysin選項(xiàng)：A:5B:n=60C:>5D:<5答案:【>5】9、問題：Themanufacturersofadeodorantclaimthatthemeandryingtimeoftheirproductis,atmost,15minutes.Asampleconsistingof16cansoftheproductwasusedtotestthemanufacturer’sclaim.Theexperim選項(xiàng)：A:Computedteststatistic=2andisgreaterthan1.753,sorejectH0:μ=15.B:Computedteststatistic=2andisgreaterthan1.645,sorejectH0:μ≤15.C:Computedteststatistic=2andisgreaterthan2.131,sorejectH0:μ≤15.D:Computedteststatistic=2andisgreaterthan1.96,sorejectH0:μ≤15.答案:【Computedteststatistic=2andisgreaterthan1.753,sorejectH0:μ=15.】10、問題：Whathappenstotherejectionregionifthelevelofsignificanceischangedfrom0.10to0.05?選項(xiàng)：A:itgetslargerB:itgetssmallerC:itdoesnotchange答案:【itgetssmaller】第十章單元測試1、問題：Restaurateur,DanielValentine,isevaluatingtwosites,PortDouglasandMissionBeach,forhisnextrestaurant.HewantstoprovethatPortDouglasresidents(population1)dineoutmoreoftenthanMissi選項(xiàng)：A:s12<s22B:m1–m2=0C:p1–p2=0D:m1–m2>0答案:【m1–m2=0】2、問題：Aresearcherwantstoestimatethedifferenceinthemeansoftwopopulations.Arandomsampleof36itemsfromthefirstpopulationresultsinasamplemeanof430.Arandomsampleof49itemsfromthese選項(xiàng)：A:43B:46C:-30D:-13答案:【-30】3、問題：Aresearcherwantstoestimatethedifferenceinthemeansoftwopopulations.Arandomsampleof36itemsfromthefirstpopulationresultsinasamplemeanof430.Arandomsampleof49itemsfromthese選項(xiàng)：A:–76.53to16.53B:–95.90to35.90C:–102.83to42.43D:85.44to25.44答案:【85.44to25.44】4、問題：Aresearcherisinterestedintestingtodetermineifthemeanofpopulationoneisgreaterthanthemeanofpopulationtwo.Thenullhypothesisisthatthereisnodifferenceinthepopulationmeans(i.e.thediffe選項(xiàng)：A:2B:23C:22D:21答案:【21】5、問題：Aresearcherwantstoconductabefore/afterstudyon11subjectstodetermineifatreatmentresultsinanydifferenceinscores.Thenullhypothesisisthattheaveragedifferenceiszerowhilethealternativeh.40withasamplestandarddeviationof1.21.Assumethatthedifferencesarenormallydistributedinthepopulation.Thedegreesoffreedomforthistestare_______.2選項(xiàng)：B:20C:9D:10答案:【10】61、問題：Aresearcherisperformingatwo-tailedrelatedsamples(matchedpairs)t-test.Atotalof12peopleareinthesample,andbeforeandaftermeasuresaretaken.Theobservedt-valueforthisis–.84.Thelevelofsignificanceis0.05.Thecorrectdecisionisto_______.選項(xiàng)：A:usethez-tableinsteadofthet-tableB:donotrejectthenullhypothesisC:rejectthenullhypothesisD:takealargersample答案:【donotrejectthenullhypothesis】7、問題：StefanIrwin,MarketingManageratClassicMerchandise,isinvestigatingresponseratestoscentedandunscenteddirectmailcatalogues.Iftheresponserateforthescentedcatalogue(population1)ishigfiveorders(twenty-fivefromthescentedandtwentyfromtheunscented)werereceivedfromthetestcatalogues.Assuminga=.01,Mike’salternatehypothesisis________________.選項(xiàng)：A:p1–p2>0B:s12<s22C:m1–m2=0D:m1–μ2≠0答案:【p1–p2>0】8、問題：CowraConstructionCompanypurchasessteelrodsforitsprojects.Basedonprevioustests,ClarrieCarter,QualityAssuranceManager,hasrecommendedpurchasingrodsfromReddingRods(populat選項(xiàng)：A:s12<s22B:s12≠s22C:s12>s22D:s12=s22答案:【s12>s22】9、問題：TamaraHill,FundManagerwithHillcrestValueFund,managesaportfolioof250commonstocks.Tamaraissearchingfora‘lowrisk’issuetoaddtotheportfolio,i.e.onewithapricevariancelessthanthat選項(xiàng)：A:donotrejectthenullhypothesiss12=s22B:rejectthenullhypothesiss12=s22C:ejectthenullhypothesiss121s22D:donotrejectthenullhypothesiss121s22答案:【donotrejectthenullhypothesiss12=s22】10、問題：CindyHo,FinanceManageratRedHillRadiatorSupplies(RHRS),theorisesthatthediscountlevelofferedtocreditcustomersaffectstheaveragecollectionperiodoncreditsales.Accordingly,shehasdeSSdfMSF5.3531.783333Error177.216182.5519Usinga=0.01,theappropriatedecisionis_________.選項(xiàng)：A:donotrejectthenullhypothesism1=m2=m3=m4B:donotrejectthenullhypothesism1≠m2≠m3≠m4C:rejectthenullhypothesism1=m2=m3=m4D:rejectthenullhypothesism1≠m2≠m3≠m4答案:【donotrejectthenullhypothesism1=m2=m3=m4】第十一章單元測試1、問題：Forthesamesetofobservationsonaspecifieddependentvariable,twodifferentindependentvariableswereusedtodevelop2simplelinearregressionmodels.Theresultsaresummarizedasfollows:Basedonth