第1題

InStatistics,parameterisAnumberofindividualsinvolvedintheresearchBalltheindividualsinthepopulationCthesummationofindividualsinthesampleD

ameasurementtodescribethesample

Eameasurementtodescribethepopulation正確答案：E第2題Aresearchermeasured50patients’weights.Therewere13patientslessthan50Kg,and17patientsover70Kg,withtherestweighingbetween50and70Kg.Whichtypeofvariableisusedbytheresearcher?AquantitativevariableBcategorizedvariableCordinalvariableDbinaryvariableEnominalvariable第3題TheStatisticinStatisticsis:AObtainedfromthedataofthepopulation.BReflectionofthestatisticalcharacteristicsofthepopulation.CAnindexcalculatedbasedonalldataofthepopulation.DObtainedafterstudyingalltheindividualsinthepopulation.EAstatisticalindicatorcalculatedbasedonthesample.正確答案：E第4題Theconversionofvariablescanonlybedonefromquantitativevariables→nominalvariables→ordinalvariables→binaryvariables,whichcannotbeconvertedinanoppositedirection.()第5題Anyinappropriatesamplingmethodmayresultinunrepresentativesampleofthepopulation.第1題What’stherelationshipbetweenmeanandstandarddeviation?AThegreaterthemeanis,thesmallerthestandarddeviationis.BThegreaterthemeanis,thelargerthestandarddeviationis.CThegreaterthestandarddeviation,thebetterthemeanrepresentstheindividuals.DThesmallerthestandarddeviation,thebetterthemeanrepresentstheindividuals.EThemeanandstandarddeviationcanbebothusedtodescribethevariationofasample.第2題Whichofthefollowingrelativemeasuresisthemostappropriateonetodescribethemortalityrateduringfiveyears?()ARatioBProportionCFrequencyDRateEIntensity正確答案：E第3題WhichofthefollowingisNOTameasurementforaveragelevelofasample?AarithmeticmeanBmedianCinter-quartilerangeDgeometricmeanEP50第4題Thestandardizedratereflects:

ARealchanceofacertaineventhappeningBRelativechanceofacertaineventhappeningCAbsolutechanceofacertaineventhappeningDRealrateEThepopulationprobability第5題Theunitofthecoefficientofvariationisthesameastheunitoftheoriginalvariable.()3.ProbabilityandDistribution第1題Whenλislargeenough,PoissondistributionPoissondistributiontendstobeanormaldistribution.()第2題The95%referencerangemeansthatindividualsfallinthisrangeareallhealthy,andthosewhoareoutofthisrangemustbepatients.()第3題WhichofthefollowingconditionscouldmakethebinomialdistributionB(n,π)approximatethePoissondistribution?AWhennislargeandπapproachesto

0.B

Whenn?￥.C

Whennπorn(1-π)approachesto0.5.DWhennislargeandπapproachesto0.5.E

Whenπapproachesto0.5.第4題Theareafrom0to2.58underthestandardnormalcurveisA99%B45%C

99.5%D47.5%E49.5%第5題WhichofthefollowingstatementsabouttheprobabilityisWRONG?

AProbabilityisthemeasureofthelikelihoodthataneventwilloccur.BAnyprobabilitytakesvaluefromtheinterval[0,1].CThefrequencyofaneventEisexactlytheprobabilityoftheeventE.DTheeventwithprobabilityof0iscalledanimpossibleevent.EInpractice,theprobabilityisdifficulttobeobtained.4.SamplingErrorandConfidenceInterval第1題Theprobabilitybywhichtheintervalcoversthepopulationmeanis_____A100%B97.5%C99%D95%E68%第2題Whichofthefollowingstatementscorrectlyexplainsthemeaningoftheinterval

AThereisa99%probabilitythatthepopulationmeanfallswithinthisinterval.BThereisa99%probabilitythatthesamplemeanfallswithinthisinterval.CItisthe99%confidenceintervalforthepopulationmean.DItisthe99%confidenceintervalforsamplemean.EBothAandCarecorrect.第3題Foragroupofgivendata,therelationshipbetween95%CIand99%CIisthatA99%CIisnarrowerthan95%CI.

B95%CIisnarrowerthan99%CI.C95%CIisequalto99%CI.D95%CIisalways1.96timesnarrowerthan99%CI.E99%CIisalways1.96timesnarrowerthan95%CI.第4題Themeanofsamplesfromnormaldistributionissubjecttotdistribution.(

)第5題A95%confidenceintervalforthepopulationmeanmeansthatthereisa95%chancethatthepopulationmeanwillfallwithintherange.()5.HypothesisTestingforContinuousVariables第1題Inhypothesistestingoftwogroups,whichofthefollowingisanullhypothesis?(

)AThetwopopulationmeansaredifferent.BThetwosamplemeansaredifferent.CThetwopopulationmeansarethesame.DThetwosamplemeansarethesame.EThetwosamplemediansaredifferent.第2題WhichofthefollowingisNOTastepofhypothesistesting?(

)ASetupthehypothesis.BDescribethesampleinformation.CSelectstatisticsandcalculatecurrentvalue.DDecidedthePvalue.EDecisionandconclusion.第3題WhichoneofthefollowingstatementsaboutPiscorrect?()APvalueistheprobabilityoftheeventthatthecurrentsituationandevenmoreextremesituationbasedontheassumptionthatnullhypothesisissatisfied.BPvalueistheprobabilitythatwerejectH1.CPvalueistheprobabilitythatwerejectH0.DPvalueisdefinedinadvance.EP<0.05meanswecannotreject

H0.第4題Inaone-sidettest,α

isalways0.025.()

第5題Inhypothesistesting,H0

isthealternativehypothesis.(

)6.AnalysisofVariance第1題WhichofthefollowingisNOTanecessarypre-conditionsoftheAnalysisofVariance(ANOVA)?

AThesamplesareindependent.BThevariancesofthepopulationsarethesame.CThepopulationsarenormallydistributed.DThepopulationsarenormallydistributed.EThesamplesarerandomlyselected.第2題Theterm‘variance’ofthemethod‘AnalysisofVariance’means:(

)AThemethodistocomparethedifferenceofpopulationvariances.BThemethodistocomparethedifferenceofsamplevariances.CThemethodrequiresthatvariancesofdifferentgroupsshouldbeequal.DThemethodcalculatesMSandcomparesMS,whileMSisvarianceinconcept.EThemethodcalculatesSSandcomparesSS,whileSSisvarianceinconcept.第3題AmongthefollowingstatementsaboutANOVA,whichoneiscorrect?(

)AF

valuecanbenegativeBF

valueisalwayslargerthan1C

MSB

canbesmallerthan

MSEDcannotbesmallerthanESSB

cannotbesmallerthanSSE第4題InANOVA,Fisalwaysgreaterthan1.(

)第5題InANOVA,whendecidingthePvalue,weuseonesideoftheFdistribution,soANOVAisaone-sidetest.

(

)7.NonparametricTestBasedonRanks第1題WhichofthefollowingtestsisNOTanon-parametrictest?AWilcoxonsignedranksumtestBFriedmantest

CLSDtest

DKruskal-WallistestEc2

test

第2題Theriboflavinwastestedfor10samplesofcabbageunderthreetestconditions(A,B,andC).TheFriedmantestshowedthatresultsunderdifferenttestconditionsarenotallequal,atsignificancelevel0.05.Wewanttoknowwhichpairsoftestconditionsaredifferent.IfBonferronimethodisusedformultiplecomparisonsofmeanranks,theadjustedsignificancelevelshouldbe:(

)A0.05/3B0.05C0.05/2D0.05×2

E0.05/6第3題WedidaWilcoxonranksumtestforthecomparisonoftwogroups.Theobservedvaluesofgroup1were0,3,7,14;theobservedvaluesofgroup2were0,0,2,4,4.Whataretheranksof0singroup1andgroup2?(

)A2,2,2B1.5,1.5,1.5C1,1,1D1,2,3E0sshouldbeignored.第4題TheFriedmantestforkgroupsofrandomizedblockdesignisalsoappropriatewhenoutcomevariableisordinal.

(

)第5題Intheranksumtest,whenthevalueofstatisticT*fallswithintherangeofcriticalvalues,thenPislessthanthecorrespondingprobability.(

)8.Chi-squareTestforCategoricalVariable第1題Eachofthe97bloodsamplesweretestedbycoagulationtestandELISArespectively.Resultsarelistedasbelow.Tocomparethepositiveratesofthetwotests,whichofthefollowingtestsisappropriate?CoagulationtestELISATotal+-+74882-14115Total88997AChi-squaretestBChi-squaretest(withcorrectionforcontinuity)CMcNemartest

DMcNemartest(withcorrectionforcontinuity)EFisher’sexacttest第2題BotharticlesⅠandⅡcomparedtheeffectiveratesofthetwolipid-loweringdrugsAandB.InarticleⅠ,c2＞c20.01,1,whileinarticleⅡ,itreportedthat

c2＞c20.05,1.ItcanbeconcludedthatarticleⅠshowedthattherewasalargerdifferenceintheeffectiveratesofthetwodrugs.(

)第3題Forpaireddesignofa2×2table,McNemartestcanbeused,thepurposeofwhichistotestwhetherthepositiveratesofthetwotestsarethesameornot.()第4題Whenrowandcolumnmarginsofafour-fold(2×2)tablearefixed,iftheactualfrequencyofonecellchanges,theexpectedfrequencyofthecorrespondingcellwill:_____AincreaseBdecreaseCnotchangeDbeuncertainEIncreaseordecreasedependingontheactualfrequencyofthecell第5題Incomparingeffectiveratesbetweentwogroups,whatarethepossiblefactorsthatmayinfluencethepowerforhypothesistesting?AStatisticalsignificancelevelanddifferenceinsamplerates

BDifferenceinpopulationratesandsamplesizeCSamplesizeanddifferenceinsampleratesDDifferenceinpopulationratesandexpectedfrequenciesESamplingerrorandstatisticalsignificancelevel9.SimpleLinearCorrelation第1題Table1Dataofabinaryvariablefromtwoindependentsamples

Basedontheabovedata,whichofthefollowingstatisticalmethodcanbeused?Aχ2testforthedifferenceinproportionsbetweentwopopulations

B

χ2testforthedifferencebetweentwoproportionsCχ2testforindependencebetweentwopopulationsD

χ2testforindependencebetweentwoproportionsEχ2testforindependencebetweentwovariables第2題ρ=0meansnocorrelationbetweenXandY.()第3題Whatconclusionswecanmakeaccordingtothisscatterdiagram?AThereisapositivecorrelationbetweenXandY.BThereisanegativecorrelationbetweenXandY.CThereisanullcorrelationbetweenXandY.DThereisalinearlyincreasingtendencybetweenXandY.EThereisalinearlydecreasingtendencybetweenXandY.第4題XandYfollowabi-variablenormaldistribution,andthecorrelationcoefficientr=0.378(P<0.05).Whatistheproperconclusionthatwecandraw?

AThereisnotenoughinformationforustomakeaconclusiononthehypothesistestfor

BWecannotsaythereexistslinearrelationshipbetweenXandYyet.CThereexistscurvilinearrelationshipbetweenXandY.DThereexistspositivecorrelationbetweenXandY.EThereexistsstrongcorrelationbetweenXandY.第5題Whenweconductananalysisoflinearcorrelation,thevariablesXandYshouldsatisfywhichofthefollowingcondition:

()AXandYfollowabi-variablenormaldistribution.BOnlyXisrequiredtofollowanormaldistribution.COnlyYisrequiredtofollowanormaldistribution.

DXandYarequantitativevariableswithoutanypre-requisitestotheirdistributionpattern.EXandYarecategoricalvariables.10.SimpleLinearRegression第1題Thereisasimplelinearregressionmodeltopredictweight(Kg)bytheage(year)ofmalechildren.Thedeterminationcoefficientis0.668,thenwhichofthefollowingstatementiscorrect?

AForeveryyearachildgrowsinage,hegrowsinheightby0.668kilogram.BForeverycentimeterachildgrowsinheight,hegrowsoneyearolder.C66.8%ofthevariationamongchildren’sweightcanbeexplainedbytheinformationoftheirage.D66.8%ofthevariationamongchildren’sagecanbeexplainedbytheinformationoftheirweight.EThecorrelationcoefficientbetweenchildren’sWeightandageis0.668第2題Thelinearcorrelationandlinearregressionanalyseswereconductedbasedonthesamesample,andcorrelationcoefficientrisofstatisticalsignificance(P<0.001).Then,whichofthefollowingstatementiscorrect_____Atheslopebinregressionanalysisisofnostatisticalsignificance.Btheslopebinregressionanalysisisofhighlystatisticalsignificance.Ctheslopebinregressionanalysisisofstatisticalsignificance.Ditisstilluncertainwhethertheslopebintheregressionanalysisisofstatisticalsignificance.Etheinterceptainregressionanalysisisofstatisticalsignificance.第3題Insimplelinearregressionanalysis,ifdeterminationcoefficientR2=1,thenmusthold

A

r=0B

r>0C

r<0D

r=1orr=-1Eb=1orb=-1第4題Inlinearregression,thevaluesofvariableXcanonlybesetbytheresearcher.(

)第5題ANOVAcanalsobeusedtotestwhetherthepopulationregressioncoefficientiszeroforsimpleregressionequation.(

)11.StatisticalPrinciplesofExperimentalDesign第1題Themaincontentsofstatisticalanalysisinclude:.AdatacollectionanddataanalysisBstatisticaldescriptionandstatisticalcomparisonC

researchdesignanddataanalysisDstatisticaldescriptionandstatisticalinferenceEstatisticalcomparisonandstatisticalinference第2題Toinvestigatethedifferenceinstudents’IQscoresbetweentwoschools,samplesizeshouldbecalculatedbeforethestudyisconducted.Ifweuse10astheminimaldifferencewhichwetrytodetect,wecalculatedsamplesizen1.Ifweincreasetheminimaldifferenceto15,thecalculatedsamplesizeisn2.Ifalltheotherconditionsarethesame,whichofthefollowingstatementsiscorrect:

___________.

A

n1:n2=（15:10）2B

n1:n2=15:10Cn1:n2=1:1Dn1:n2=（10:15）2

En1:n2=10:15第3題Thepurposeoffollowingthreeprinciplesduringexperimentaldesignis:___________.

AEasiertostatisticalanalysisB