在線網(wǎng)課《Medical Statistics（醫(yī)學(xué)統(tǒng)計(jì)學(xué)）(寧波大學(xué))》單元測(cè)試考核答案

第一章單元測(cè)試第二章單元測(cè)試第三章單元測(cè)試第四章單元測(cè)試第五章單元測(cè)試第六章單元測(cè)試第七章單元測(cè)試第八章單元測(cè)試第九章單元測(cè)試第十章單元測(cè)試第十一章單元測(cè)試第十二章單元測(cè)試第一章單元測(cè)試1【單選題】(2分)Whichofthefollowingbelongstocontinuousnumericalvariable?（）A.gender.B.ageC.countryD.bloodtype2【單選題】(2分)WhatistherangeofprobabilityPforarandomevent?（）A.P=1B.-1≤P≤0C.0≤P≤1D.-1≤P≤13【單選題】(2分)Whichofthefollowingcannotbeavoidedduringsampling?（）A.samplesizeistoolargeB.personalerrorC.samplesizeistoosmallD.samplingerror4【單選題】(2分)Low,medianandhighbelongto_____?（）A.MeasuringdataB.CountingdataC.RawdataD.Orderingdata5【單選題】(2分)Whichofthefollowingbelongstodiscretenumericalvariable________?（）A.WeightB.CancerdegreeC.NumberofchildreninafamilyD.Height6【單選題】(2分)Whichoneofthefollowingvariablesisnotcategorical?（）A.Ageofaperson.B.Choiceonatestitem:trueorfalse.C.Maritalstatusofaperson(single,married,divorced,other)D.Genderofaperson:maleorfemale.7【單選題】(2分)Whichofthefollowingbelongstothemeasurementdata________.（）A.bloodtypeB.curativeeffectC.WBCcountsD.gender8【單選題】(2分)Whichofthefollowingbelongstocategoricalvariable________.（）A.genderofpeopleinaspecificregion.B.heartrateC.scoreofIQD.daysstayinginhospital第二章單元測(cè)試1【單選題】(2分)Themeasureofdispersionmostcommonlyusedinconjunctionwiththearithmeticmeanisthe:（）A.rangeB.standarddeviationC.interquartilerangeD.variance2【單選題】(2分)SimplybyscanningtheA.7,8,9,10,11,12,13,14,15,16B.80,80,80,80,80,80,80,80,80,80C.6,6,9,10,11,12,14,17,20,90D.9,9,9,10,10,10,10,11,11,113【單選題】(2分)Themostcommonlyusedmeasureofcentrallocationforantibodytitersisthe:（）A.geometricmeanB.modeC.medianD.arithmeticmean4【單選題】(2分)Whichrangecharacterizestheinterquartilerange?（）A.From25thpercentileto75thpercentileB.From1.96standarddeviationsbelowthemeanto1.96standarddeviationsabovethemeanC.From5thpercentileto95thpercentileD.From10thpercentileto90thpercentile5【單選題】(2分)AllofthefollowingaremeasuresofdispersionEXCEPT:（）A.interquartilerangeB.standarddeviationC.rangeD.median第三章單元測(cè)試1【單選題】(2分)Whichofthefollowingisnotapplicabletodescribecategoricaldata?（）A.ProportionB.RatioC.RateD.Mean2【單選題】(2分)Whichofthefollowingreferstothefrequencyofagiveneventduringorafteracertaintimeperiod?（）A.MeanB.RateC.ProportionD.Ratio3【單選題】(2分)WhichofthefollowingisTRUE?（）A.Whentherateiscomputedbasedonasampledata,itusuallyshouldbeadjustedaccordingtothecompositionofthepopulationB.Ifthetotalnumberofobservationsisnotsufficient,theresultsshouldbeexpressedinrelativenumber.C.Thefrequencyisatime-dependentindicator.D.Theratiocanbeusedtoexplainthefrequency.4【單選題】(2分)Thereare120patientswithacertaindisease,including114malesand6females,accountingfor95%and5%respectively.Theconclusionis（）A.Thediseaseiseasytogetinmen.B.NoconclusioncanbedrawnC.ThediseaseiseasytogetinwomenD.Thesusceptibilityratesofmaleandfemalepatientsarethesame.5【單選題】(2分)ThecrudemortalityofmalignanttumorsincountyAishigherthanthatinCountyB.Afterstandardization,thestandardizedmortalityofmalignanttumorsincountyAislowerthanthatinCountyB.Themostlikelyreasonis（）A.TheproportionoftheelderlypopulationinthetotalpopulationincountyAislargerthanthatinCountyBB.HighdiagnosticlevelincountyAC.ThecancerpreventionandtreatmentworkincountyAisbetterthanthatinCountyBD.TheproportionoftheelderlypopulationinthetotalpopulationincountyAissmallerthanthatinCountyB第四章單元測(cè)試1【單選題】(2分)Whichofthefollowingstatisticalchartsappliestoacontinuousvariable（）A.ScattergraphB.BargraphC.Linegraph’D.Histogram2【單選題】(2分)Piechartscanbeusedtodescribe（）A.thedevelopmentspeedofphenomenaB.theinternalstructureofphenomenaC.thefrequencydistributionofphenomenaD.thechangingtrendofphenomena3【單選題】(2分)Whichofthefollowingstatisticaltableisnotmadecorrectly（）A.ThetitleofthestatisticaltableisplacedatthetopofthetableB.ThenumbersinthetablearealignedtothedecimalplacesC.StatisticaltablesgenerallyuseheaderstoindicatethemeaningandunitsofthedataD.Themoreinformationinatable,thebetter4【單選題】(2分)Tocomparetheincidencerateofthreediseasesinacertainareainacertainyear,wecandraw（）A.linechartB.circularchartC.straightbarchartD.histogram5【單選題】(2分)Torepresentthecomponentratioofvariouscausesofdeathinacertainplaceinacertainyear,wecandraw（）A.histogramB.straightbarchartC.circularchartD.linechart第五章單元測(cè)試1【單選題】(2分)ThesmallertheStandarderrorofsamplemeanis,（）A.thegreaterthereliabilityofestimatingthepopulationmeanfromthesamplemeanB.thelargerthevariationoftheobservedindividualC.thesmallerthevariationoftheobservedindividualD.thegreaterthesamplingerroris2【單選題】(2分)Thecauseofsamplingerroris（）A.measurementisinaccurateB.sampleisnotrandomlyselectedC.dataarenotnormallydistributedD.individualdifferences3【單選題】(2分)Accordingtothesampledata,the95%confidenceintervalofwhitebloodcellcountinhealthyadultsis,whichmeans（）A.Theprobabilityoftheoverallmeaninthisintervalis95%B.Itisestimatedthat95%oftheobservationsinthepopulationarewithinthisrangeC.Theprobabilitythatthisintervalcontainsthesamplemeanis95%D.Theprobabilitythatthisintervalcontainsthepopulationmeanis95%4【單選題】(2分)Whensamplingfromapopulationofmeasurementdata.Ifthesamplesizeisincreased,therewillbe（）A.increaseofstandarderrorB.increaseinstandarddeviationC.decreaseofstandarderrorD.decreaseinstandarddeviation5【單選題】(2分)Inthesamepopulation,multiplerandomsamplesareusedtoestimatethe95%confidenceintervalofthepopulationmean.Themostreliableis（）A.sampleswithlargestandarderrorB.sampleswithsmallstandarderrorC.sampleswithsmallstandarddeviationD.sampleswithsmallmean第六章單元測(cè)試1【判斷題】IftheP-A.對(duì)B.錯(cuò)2【判斷題】Practicalsignificanceisnotthesameasstatisticalsignificance.（）A.對(duì)B.錯(cuò)3【判斷題】Itisalwaysbettertouseasignificancelevelof=0.05thantouse=0.01becauseitiseasiertofindstatisticalsignificance.（）A.錯(cuò)B.對(duì)4【判斷題】Aresearcherteststhefollowingnullhypothesis:（）A.對(duì)B.錯(cuò)5【判斷題】AstudysummarysaysthattheresultsarestatisticallysignificantandtheP-A.對(duì)B.錯(cuò)6【判斷題】Statisticallysignificantatthe=0.01levelmeansthereisonly1%probabilitythatthenullhypothesisistrue.（）A.對(duì)B.錯(cuò)第七章單元測(cè)試1【單選題】(2分)Whendoingthehypothesistest,whichsituationmaymakethetype2error?（）A.If<isfalse,P;0.05,rejectB.Ifistrue,P0.05,reject,acceptC.Ifisfalse,P0.05,notrejectD.Ifistrue,P0.05,notreject2【單選題】(2分)Forthetwoindependentsamplesttest,ifbothofthetwosamplesizeisn,thenthedegreeoffreedomis:（）A.2n-2B.2n-1C.n-1D.2n3【單選題】(2分)Fortwoindependentsamplesttest,thesmallerthePA.thegreaterthedifferencebetweenthetwopopulationsB.thegreaterreasontobelievethatthetwopopulationsaredifferentC.thegreaterthedifferencebetweenthetwosamplemeansD.thesmallerthedifferencebetweenthetwopopulations5【單選題】(2分)Hemoglobin(Hb)of25lead-exposedworksweretested,themeanofHbwas130.83g/L,andSDis25.74g/L.ItisknownthattheaverageHbofnormaladultmenis140g/L.IsthereanydifferenceinHbbetweenlead-exposedworkersandnormaladultmen?Theappropriatehypothesistestis:（）A.matchedorpairedsamplest-testB.notabovetestC.onesamplet-testD.independentsamplest-test第八章單元測(cè)試1【單選題】(2分)ThebasicideaandkeypointsofANOVAare（）A.ThemeansquarebetweengroupisgreaterthanthemeansquarewithingroupB.ThetotalvariationanditsdegreeoffreedomcanbedecomposedaccordingtodifferentsourcesC.TheratiooftwovariancesobeysFdistributionD.Themeansquarewithingroupisgreaterthanthemeansquarebetweengroup2【單選題】(2分)OneoftheapplicationconditionsofANOVAishomogeneityofvariance（）A.Variancebetweengroup=VariancewithingroupB.ThecorrespondingpopulationvarianceofeachcomparisongroupisequalC.Thecorrespondingsamplevarianceofeachcomparisongroupisequal.D.Totalvariance=Variancebetweengroup+Variancebetweengroup=Variancewithingroup3【單選題】(2分)Themeansquarebetweengroupsincompletelyrandomizeddesignanalysisofvariancereflectsthat（）A.EffectsizeofacertainfactorB.TheaveragelevelofvarianceineachgroupC.RandommeasurementerrorsizeD.Processingfactoreffectandrandomerror4【單選題】(2分)Forthecomparisonofthetwogroupsofdata,therelationshipbetweenANOVAandt-testwasasfollows（）A.TtestresultsaremoreaccurateB.ApproximateequivalenceC.AnalysisofvarianceresultsaremoreaccurateD.Completeequivalence5【單選題】(2分)Inananalysisofvarianceofmultigroups,ifp0.05,whatweshoulddonext?（）A.TestforhomogeneityofvarianceB.TestfornormalityC.MultiplecomparisonD.T-testoftwomeans第九章單元測(cè)試1【單選題】(2分)Inwhichcase,performingχ<sup2</suptestforfour-foldtable,thecontinuitycorrectionisnecessary.（）A.T＜1orn＜40B.T≥5orn≥40C.1≤T＜5andn≥40D.T＜5andn≥402【單選題】(2分)Inwhichcase,performingχ<sup2</suptestforfour-foldtable,thecontinuitycorrectionisnecessary?（）A.1≤T＜5andn≥40B.T＜1orn＜40C.T≥5andn≥40D.T≥5orn≥403【單選題】(2分)Inwhichcase,performingχ2testforfour-foldtable,theFisherexacttestshouldbeused?（）A.1≤T＜5andn≥40B.T≥5andn≥40C.T＜1orn＜40D.T≥5orn≥404【單選題】(2分)Thepurposeofthetestofdifferencebetweenthetwosampleratesis（）A.inferwhetherthetwosampleratesaredifferentB.inferwhetherthereisadifferencebetweenthetwosampleratesandthetwopopulationratesC.inferwhetherthedifferencebetweenthetwopopulationratesissignificantD.inferthedifferencebetweenthetwopopulationrates5【單選題】(2分)Thedegreeoffreedomofchi-squaretestis（）A.R-1B.C-1C.(R-1)(C-1)D.RC-1第十章單元測(cè)試1【單選題】(2分)Comparedwithparametrictest,theadvantagesofnonparametricranksumtestareasfollows:（）A.hightestefficiencyB.ThetestresultsaremoreaccurateC.MakefulluseofinformationD.Wideapplicationrange2【單選題】(2分)Forthecomparisonofmeasurementdata,thenonparametricmethodisusedtoanalyzeundertheconditionthattheparametermethodissatisfied（）A.AddtypeIerrorB.addtypeIIerrorC.ReducetypeIerrorsD.reducetypeIIerrors3【單選題】(2分)Ranksumtestoftwosamplescomparison:ifthesamplesizeisfixed,thegreaterthedifferencebetweenthetwogroupsofranksumindicates（）A.ThemorereasontosaythatthereisnodifferencebetweenthetwopopulationsB.Thegreaterthedifferencebetweenthetwosamples,themorereasonablethedifferencebetweenthetwopopulationsC.thesmallerthedifferencebetweenthetwopopulationsD.Thegreaterthedifferencebetweenthetwopopulations4【單選題】(2分)Inaclinicaltrialstudy,thecurativeeffectisdividedintofourgrades:"cured,markedlyeffective,effectiveandineffective".Now,ifyouwanttocomparethetreatmenteffectbetweentheexperimentalgroupandthecontrolgroup,theappropriatestatisticalmethodis（）。A.contingencychisquaretestB.FisherexacttestC.chisquaretestD.WilcoxonRankSumtest(Mann-WhitneyUtest)5【單選題】(2分)Comparedwiththet-test,theadvantageoftheRankSumtestis（）A.TheformulaismorereasonableB.HighinspectionefficiencyC.SmallsamplingerrorD.Thecalculationissimpleandnotrestrictedbydistribution第十一章單元測(cè)試1【單選題】(2分)Ifwewanttoanalyzethelinearrelationshipbetweentwoquantitativevariableswithnormaldistribution,whatmethodcanweuse?（）A.SpearmanrankcorrelationB.ANOVAC.PearsoncorrelationD.ttest2【單選題】(2分)Ifwewanttoanalyzetherelationshipsbetweentheoutcomes(cured,markedlyeffective,effectiveandineffective)oftwodrugstreatment,