在线网课《Medical Statistics（医学统计学）(宁波大学)》单元测试考核答案

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