MedicalStatistics（醫(yī)學(xué)統(tǒng)計學(xué)）知到智慧樹期末考試答案題庫2025年寧波大學(xué)Whichthefollowingobservationresultsbelongtoordinaldata:（）

答案:degreeofillnessWhichsituationshouldapplyPaired-SamplesTtestprocesstoanalyze?（）

答案:ComparisonofthediseasestatusofpatientsbeforeandaftertakingdrugWhichshouldbeusedtodescribethevariabilityofagroupofskewdistributiondata（）

答案:Inter-quartilerangeWhichshouldbeusedtocomparethevariabilityofheightandweightdata（）

答案:CoefficientofvariationWhichshouldbeusedforcomparisonofordinaldata（）

答案:RanksumtestWhichrangecharacterizestheinterquartilerange?（）

答案:From25thpercentileto75thpercentileWhichonerepresentsstandarddeviation?（）

答案:Std.DeviationWhichoneofthefollowingvariablesisnotcategorical?（）

答案:Ageofaperson.Whichoneisnotbelongedtothetypeofvariable?（）

答案:ViewerWhichofthefollowingstatisticaltableisnotmadecorrectly（）

答案:Themoreinformationinatable,thebetterWhichofthefollowingstatisticalchartsappliestoacontinuousvariable（）

答案:HistogramWhichofthefollowingstatisticalchartthatordinatesmuststartfrom0（）

答案:straightbarchartWhichofthefollowingreferstothefrequencyofagiveneventduringorafteracertaintimeperiod?（）

答案:RateWhichofthefollowingiswrongaboutthelistingrequirementsofthestatisticaltable?（）

答案:Thehorizontalheadingistheresearchobject,whichislistedontherightsideofthetable;TheverticalheadingistheanalysisindexandislistedontheleftsideofthetableWhichofthefollowingisTRUE?（）

答案:Whentherateiscomputedbasedonasampledata,itusuallyshouldbeadjustedaccordingtothecompositionofthepopulationWhichofthefollowingisnotapplicabletodescribecategoricaldata?（）

答案:MeanWhichofthefollowingisnotanadvantageofnonparametricstatistics（）

答案:applicabletonormaldistributiondataWhichofthefollowingindicatorsistherelativeratio（）

答案:CoefficientofvariationWhichofthefollowingdatacanbefullydescribedbymeansofmeanandstandarddeviation?（）

答案:normaldistributionandapproximatenormaldistributionWhichofthefollowingcannotbeavoidedduringsampling?（）

答案:samplingerrorWhichofthefollowingbelongstothemeasurementdata________.（）

答案:WBCcountsWhichofthefollowingbelongstodiscretenumericalvariable________?（）

答案:NumberofchildreninafamilyWhichofthefollowingbelongstocontinuousnumericalvariable?（）

答案:ageWhichofthefollowingbelongstocategoricalvariable________.（）

答案:genderofpeopleinaspecificregion.Whichmenuisusedtoinsertavariable?（）

答案:InsetVariableWhichmenucanbeusedforchisquaretest?（）

答案:CrosstabsWhichindicatorisusedtoevaluatetheperformanceoflinearmodel?（）

答案:RsquareWhenthereareextralargeorextrasmallvaluesinthemeasurementdata,thearithmeticmeancanbeusedtodescribetheaveragelevel.（）

答案:錯Whenthemeanofthetwosamplesiscompared,ifP>0.05aftert-test,itindicatesthatthemeanofthetwopopulationsinthecomparisongroupisequal.（）

答案:錯Whenthedistributionoftheoriginaldataisunknown,theindicatorindicatingthecentralizedtrendshouldbe（）

答案:medianWhensamplingfromapopulationofnumericaldata,thecauseofsamplingerroris（）

答案:individualvaluesinthepopulationaredifferentWhensamplingfromapopulationofmeasurementdata.Ifthesamplesizeisincreased,therewillbe（）

答案:decreaseofstandarderrorWhenperformingthetwosamplesRankSumtestforcompleterandomdesign,whichofthefollowingtestsassumesisthecorrect（）

答案:ThepopulationdistributioncorrespondingtothetwosamplesisthesameWhenperformRankSumtestforcomparisonbetweentwosamples.Ifthesamplesizeiscertain,thegreaterthedifferencebetweentheRankSumofthetwogroups,itindicatesthat（）

答案:themorereasontoexplainthedifferencebetweenthetwopopulationsWhendrawinganyfigure,thestartingscaleoftheverticalcoordinatemustbe"0".（）

答案:錯Whendoingthehypothesistest,whichsituationmaymakethetype2error?（）

答案:WhendoingtheANOVAofmultiplegroupmeancomparison.IfP<0.05,（）

答案:qtestWhendoregressionanalysisfortwogroupsofdata.ThegroupwithlargerlinearregressioncoefficientBrepresents（）

答案:TheRsquaremaybelargeorsmallWhencomparisonofmeanvaluesoftwosamples,ifthetestresultsshowP>0.05,itmeans（）

答案:donotsupporttheconclusionthatthetwopopulationsaredifferentWhencalculatethepositiveconversionrateofserologicalexaminationafterhepatitisBvaccination,thedenominatoris（）

答案:numberofhepatitisBvaccinationsWhatistherangeofprobabilityPforarandomevent?（）

答案:0≤P≤1Valueofcoefficientofvariation（）

答案:canbegreaterthan1orlessthan1Utestorchi-squaretestforfourfoldtablecanbeusedtocomparethetwosamplerates.（）

答案:對Torepresentthecomponentratioofvariouscausesofdeathinacertainplaceinacertainyear,wecandraw（）

答案:circularchartToreflectthechangeofhepatitisAincidencerateinacityfor5consecutiveyears,whichtypeofgraphshouldweselect?（）

答案:linechartToreducetheclassIIerrorofhypothesistest,themethodthatshouldbeusedis（）

答案:IncreasesamplesizeToinferthepopulationfromthesample,therepresentativesamplerefersto（）

答案:SelectsomeindividualsfromthepopulationaccordingtotherandomprincipleToinferthedifferencebetweenthetwopopulationmeansfromthedifferencebetweenthetwosamplemeans,andthedifferenceisstatisticallysignificant,whichmeans（）

答案:ThereisreasontobelievethatthereisadifferenceintheaverageofthetwopopulationsTodescribetheaveragelevelofagroupofskewdistributiondata,whichshouldgenerallybeselected（）

答案:MedianTocomparethevariationofheightbetween7-year-oldboysand17-year-oldyouth,theinter-quartilespacingshouldbeused.（）

答案:錯Tocomparethepositivereactionratesofthetwogroups,ifthesamplesizeisverysmall(e.g.n1<10,n2<10),then（）

答案:FisherexacttestTocomparetheincidencerateofthreediseasesinacertainareainacertainyear,wecandraw（）

答案:straightbarchartTocalculatetheaverageincubationperiodof124casesofstreptococcalpoisoning,（）

答案:MedianThereisnodefinitevalueatthelargeendofasetofmedicaldata,andtheapplicablestatisticalindextodescribeitscentertendencyis（）

答案:MedianThereare120patientswithacertaindisease,including114malesand6females,accountingfor95%and5%respectively.Theconclusionis（）

答案:NoconclusioncanbedrawnTheweightof95%ofthe2508-year-oldboysinacityisintherangeof18~30kg,soitcanbeinferredthatthestandarddeviationofthe250boys'weightisabout（）

答案:3.1kgThevariationamongindividualsisthemainsourceofsamplingerror.（）

答案:對TheT-testforcorrelationcoefficientρandtheT-testforregressioncoefficientβareequivalent.（）

答案:對Thestrongerthecorrelationbetweenthetwonumericalvariables,（）

答案:thegreatertheabsolutevalueofthecorrelationcoefficientThestandarderrorofthesamedatamustbelessthanthestandarddeviation.（）

答案:對Thestandarddeviationofsampledatais（）

答案:notdeterminedbythemeanThesmokingrateofmenis10timesthatofwomen,whichis（）

答案:relativeratioThesmallertheStandarderrorofsamplemeanis,（）

答案:thegreaterthereliabilityofestimatingthepopulationmeanfromthesamplemeanThesmallerthepvalue,thesmallertheprobabilityofrejectingtheH0.（）

答案:錯Theresearchobjectofmedicalstatisticsis（）

答案:MedicaleventswithvariationTheRangeorInter-quartilerangeshouldbeusedtodescribethedispersiondegreeoftheincubationperiodofinfectiousdiseases.（）

答案:對Therangeof95%medicalreferencerangeofanindicatorindicates（）

答案:95%ofthe"normal"populationisinthisrangeThepurposeofthetestofdifferencebetweenthetwosampleratesis（）

答案:inferwhetherthedifferencebetweenthetwopopulationratesissignificantthepurposeofhypothesistestis（）

答案:testwhetherthepopulationparametersaredifferentThepurposeofcalculatingstandardizedmortalityis（）

答案:eliminatetheimpactofdifferentinternalcompositionindifferentregionsThemostcommonlyusedmeasureofcentrallocationforantibodytitersisthe:（）

答案:geometricmeanThemeasureofdispersionmostcommonlyusedinconjunctionwiththearithmeticmeanisthe:（）

答案:standarddeviationThemeansquarebetweengroupsincompletelyrandomizeddesignanalysisofvariancereflectsthat（）

答案:ProcessingfactoreffectandrandomerrorThemeanandstandarddeviationofstandardnormaldistributionare（）

答案:0and1Themainstatisticalindexdescribingtheclassifiedvariablesis（）

答案:relativeThemaindifferencebetweent-testandU-testforthecomparisonofthetwosamplemeansis（）

答案:U-testrequireslargesampledataTheleastsquareestimationofregressioncoefficientis（）

答案:verticaldistancefromeachpointtoymeanstraightlineThelargertheregressioncoefficientisreflectedinthescatterdiagram,themorethescatterpointsareconcentratedinastraightline.（）

答案:錯Thegeometricmeanshouldbeusedastheindextoreflectthetendencyofagroupofisometricdatasets.（）

答案:對Thefollowingpracticalproblemthatcannotbesolvedbythechisquaretestformulais（）

答案:drugefficacyoftwogroupsoforderedtestresultsTheflatterthecurveshapeofthenormaldistributionis,thestandarddeviationwillbe（）

答案:largerThefactoraffectingthesamplingerrorofpopulationrateestimationis（）

答案:populationrateandsamplesizeThedegreeoffreedomofchi-squaretestis（）

答案:(R-1)(C-1)Thedataobtainedbycountingtheperipheralbloodredbloodcellsof200patientsiscountdata.（）

答案:錯ThecrudemortalityofmalignanttumorsincountyAishigherthanthatinCountyB.Afterstandardization,thestandardizedmortalityofmalignanttumorsincountyAislowerthanthatinCountyB.Themostlikelyreasonis（）

答案:TheproportionoftheelderlypopulationinthetotalpopulationincountyAislargerthanthatinCountyBTheconditionforapplyingthepercentilemethodtoestimatethereferencerangeis（）

答案:dataobeypartialdistributionTheclosertheRsquareinregressionanalysisisto1,indicatingthat（）

答案:ThegreatertheinfluenceoftheindependentvariableonthecorrespondingvariableThecauseofsamplingerroris（）

答案:individualdifferencesThebasicstepofmedicalstatisticsis（）

答案:Design,collect,processandanalyzedataThebasicideaoftheranksumtestforpairedsamplesisthatifthetesthypothesisistrue,（）

答案:theabsolutevaluesofpositiveandnegativeranksumsdonotdiffergreatlyThebasicideaandkeypointsofANOVAare（）

答案:ThetotalvariationanditsdegreeoffreedomcanbedecomposedaccordingtodifferentsourcesThearithmeticmeanismainlyusedtodescribethecharacteristicsofnormaldistributionorapproximatenormaldistributiondata.（）

答案:對Theareafrommeanto+1.96onthehorizontalaxisofthenormalcurveis（）

答案:47.5%Theantibodytitersof6peopleweredeterminedtobe1:20,1:40,1:80,1:80,1:160and1:320afteronemonthofinfluenzavaccination.Theindicatortobeusedforcalculatingtheaveragetiteris（）

答案:GeometricmeanThe95%confidenceintervalofthedifferencebetweenthetwomeanscanalsoreflectwhetherthedifferencebetweenthetwomeansisstatisticallysignificant.（）

答案:對Tdistributionisacurvewith0asthecenterandissymmetrical.（）

答案:錯Statisticallysignificantatthe=0.01levelmeansthereisonly1%probabilitythatthenullhypothesisistrue.（）

答案:錯Statisticalinferenceincludestheestimationofpopulationmeanorpopulationrateanditshypothesistest.（）

答案:對Statisticalanalysisincludesstatisticaldescriptionandstatisticalinference.（）

答案:對Standarderrorshouldbeusedtodescribethedispersiontendencyofindividualobservationsofdatawithapproximatenormaldistribution.（）

答案:錯Simplybyscanningthevaluesineachdistributionbelow,identifythedistributionwiththesmalleststandarddeviation.（）

答案:80,80,80,80,80,80,80,80,80,80Samplingfromaskewedpopulation,whennislargeenough(e.g.n>60),thedistribution____ofthesamplemean.（）

答案:approximatenormaldistributionRanksumtestoftwosamplescomparison:ifthesamplesizeisfixed,thegreaterthedifferencebetweenthetwogroupsofranksumindicates（）

答案:Thegreaterthedifferencebetweenthetwosamples,themorereasonablethedifferencebetweenthetwopopulationsRandomerrorrefersto（）

答案:errorcausedbyaccidentalfactorsRvaluereflectstheclosenessanddirectionoftherelationshipbetweenthetwovariables.（）

答案:對Probabilityisameasurefortheprobabilityofarandomevent.（）

答案:對Practicalsignificanceisnotthesameasstatisticalsignificance.（）

答案:對Piechartscanbeusedtodescribe（）

答案:theinternalstructureofphenomenaOneoftheapplicationconditionsofANOVAisthehomogeneityofvariance,whichrefersto（）

答案:thecorrespondingpopulationvarianceofeachcomparisongroupisequalOneoftheapplicationconditionsofANOVAishomogeneityofvariance（）

答案:ThecorrespondingpopulationvarianceofeachcomparisongroupisequalLow,medianandhighbelongto_____?（）

答案:OrderingdataLinearcorrelationanalysiscanbeusedtostudythequantitativerelationshipbetweenchildren'sgenderandweight.（）

答案:錯LetthevariableofpairedsamplesbeX1andX2,thentheranksumtestofpaireddatais（）

答案:sorttheabsolutevalueofthedifferencebetweenX1andX2fromsmalltolargeItisknownthatthecontentofapolipoproteinB(mg/dl)inatheroscleroticpatientsshowsasignificantlyskeweddistribution,and____shouldbeusedasthestatisticalindextodescribetheirindividualdifferences（）

答案:Inter-quartilespacingItisalwaysbettertouseasignificancelevelof=0.05thantouse=0.01becauseitiseasiertofindstatisticalsignificance.（）

答案:錯Indicatestheaveragelevelofserologicaltiterdata,____iscommonlyused（）

答案:GeometricmeanInwhichofthefollowingcases,itisappropriatetousethecontinuitycorrectionformulatocalculatethechisquarevalue.（）

答案:140Inwhichcase,performingχ2testforfour-foldtable,useclassicalorspecificformula.（）

答案:T≥5orn≥40Inwhichcase,performingχ2testforfour-foldtable,theFisherexacttestshouldbeused?（）

答案:T＜1orn＜40Inwhichcase,performingχ2testforfour-foldtable,thecontinuitycorrectionisnecessary.（）

答案:T≥5orn≥40Inwhichcase,performingχ2testforfour-foldtable,thecontinuitycorrectionisnecessary?（）

答案:1≤T＜5andn≥40Inthesamplingstudy,whenthenumberofsamplesincreasesgradually,（）

答案:standarderrorgraduallydecreasesInthesamepopulation,multiplerandomsamplesareusedtoestimatethe95%confidenceintervalofthepopulationmean.Themostreliableis（）

答案:sampleswithsmallstandarderrorInone-wayANOVA,ifthetreatmentfactorshavenoeffect,thereshouldbe（）

答案:F=1Inlinearregression,whentheRsquarehasstatisticalsignificance,thelargeritsvalue,thebetterthefittingeffectoftheregressionequation.（）

答案:對InANOVA,whenp<0.05,（）

答案:ItcanbeconsideredthatthemeanvaluesofallpopulationsareunequalornotallequalInananalysisofvarianceofmultigroups,ifp<0.05,whatweshoulddonext?（）

答案:MultiplecomparisonInaclinicaltrialstudy,thecurativeeffectisdividedintofourlevels:"cured,markedlyeffective,effectiveandineffective".Now,tocomparethetreatmenteffectbetweenthetestgroupandthecontrolgroup,theappropriatestatisticalmethodis（）

答案:WilcoxonranksumtestInaclinicaltrialstudy,thecurativeeffectisdividedintofourgrades:"cured,markedlyeffective,effectiveandineffective".Now,ifyouwanttocomparethetreatmenteffectbetweentheexperimentalgroupandthecontrolgroup,theappropriatestatisticalmethodis（）。

答案:WilcoxonRankSumtest(Mann-WhitneyUtest)Ifwewanttopredictthevalueofonevariableaccordingtothevalueofanothervariable.Supposethetwovariablesfollownormaldistribution.Whatmethodcanweuse?（）

答案:simplelinearregressionIfwewanttoanalyzetherelationshipsbetweentheoutcomes(cured,markedlyeffective,effectiveandineffective)oftwodrugstreatment,whatmethodcanweuse?（）

答案:SpearmanRankcorrelationIfwewanttoanalyzethelinearrelationshipbetweentwoquantitativevariableswithnormaldistribution,whatmethodcanweuse?（）

答案:PearsoncorrelationIftheP-valueislargerthan0.05,thenullhypothesisistrue.（）

答案:錯Ifsignificantlevelofhypothesistestα=0.05,itindicatesthatfalsepositiveerrorrateallowedinstatisticaltestis0.05.（）

答案:對Ifoneoftheactualnumbersinthefourgridtableis0,then（）

答案:ItisnotyetpossibletodecidewhethertheChisquaretestcanbeperformedornot.Ifasetofdataisnormallydistributed,theprobabilitythatthevalueslessthan+1.96sis（）

答案:97.5%Hemoglobin(Hb)of25lead-exposedworksweretested,themeanofHbwas130.83g/L,andSDis25.74g/L.ItisknownthattheaverageHbofnormaladultmenis140g/L.IsthereanydifferenceinHbbetweenlead-exposedworkersandnormaladultmen?Theappropriatehypothesistestis:（）

答案:onesamplet-testFortwoindependentsamplesttest,thesmallerthePvalue,then:（）

答案:thegreaterreasontobelievethatthetwopopulationsaredifferentForthetwoindependentsamplesttest,ifbothofthetwosamplesizeisn,thenthedegreeoffreedomis:（）

答案:2n-2Forthepopulationwithnormalskewdistribution,whenthesamplesizeislargeenough,thedistributionofthesamplemeanisapproximately（）

答案:normaldistributionForthenonparametrictestofpaireddesigndata,theNullhypothesisshouldbe:Thesamplemedianisequalto0.（）

答案:錯Forthecomparisonoftwogroupsofdata,therelationshipbetweenANOVAandt-testis（）

答案:CompleteequalForthecomparisonofthetwogroupsofdata,therelationshipbetweenANOVAandt-testwasasfollows（）

答案:CompleteequivalenceForthecomparisonofmultiplemeasurementdata,whenthedistributiontypeisunclear,thestatisticalmethodtobeselectedis（）

答案:KruskalWallisHtestForthecomparisonofmeasurementdata,thepossibleresultofnonparametricanalysisundertheconditionofmeetingtheparametermethodis（）

答案:addTypeIIerrorForthecomparisonofmeasurementdata,thenonparametricmethodisusedtoanalyzeundertheconditionthattheparametermethodissatisfied（）

答案:addtypeIIerrorFortheANOVAofcompletelyrandomdesigndata,themeansquarebetweengroupsmustbegreaterthanorequaltothemeansquarewithinthegroup,thatis,theFvaluecannotbelessthan1.（）

答案:錯Forgroupcomparisonofmedicalmetrologydata,comparedwithparametrictest,theadvantageofnonparametricranksumtestis（）

答案:wideapplicationrangeFordatawithapproximatenormaldistribution,theindextobeusedtodescribethedegreeofvariationis（）

答案:StandarddeviationFvalueinvariancehomogeneitytestistheratiooftwostandarddeviations.（）

答案:錯Eachobservationvalueisadded(orsubtracted)bythesamenumbernotequalto0,then（）

答案:meanchanged,standarddeviationunchangedDescribethevariationdegreeofnormaldistribution.Whichofthefollowingindicatorsisbetter?（）

答案:StandarddeviationDescribethevariabilityofagroupofskewdistributiondata.Whichofthefollowingindicatorsisgood?（）

答案:interquartilerangeCured,markedlyeffective,improvedandineffectivebelongto（）

答案:graded