Medical Statistics知到智慧樹期末考試答案題庫2025年南方醫(yī)科大學(xué)Southern Medical UniversityVIP

MedicalStatistics知到智慧樹期末考試答案題庫2025年南方醫(yī)科大學(xué)SouthernMedicalUniversityχ2testcanbesuedtocomparetwoindependentsamplerates（）.

答案:對μstandsforsamplestatistics.（）

答案:錯(cuò)Wilcoxonranksumtestisusedforindependentsamples（）.

答案:對Wilconxontestcanbeusedtoanalyze（）data.

答案:AllofthemWhichoneiswrongabouttheabsolutelynocorrelation（）.

答案:0Whichoneisnottherequirementsofdataforusingindependentt-test（）

答案:ThedataaredependentWhichoneisnotfordescribingthedispersionofdata（）

答案:MeanWhichonedoesnotdescribethecentraltendencyofdata（）.

答案:VarianceWhichisnotapropertyofthestandardnormaldistribution?（）

答案:ItisuniformWhichgraphisbesttodescribefrequencytable（）.

答案:HistogramWhichfigurecanbechosentodescribethedistributionofdata（）

答案:stem-and-leaf；histogramWhenyouconductanFtestduringindependentsamplettest,（）estimatesofthepopulationvariancearecompared.

答案:twoWhenyouareconductingthettest,thepopulationmustbeapproximatelynormaldistributed.（）

答案:對Whenthreeormoremeansarecompared,youusethe（）method

答案:ANOVAWhenthevalueofαisincreased,theprobabilityofcommittingatypeIIerroris（）

答案:DecreasedWhenthevalueofαisincreased,theprobabilityofcommittingatypeIerroris（）.

答案:IncreasedWhenperformingaone-samplettest,theremaybeapreconceivedassumptionaboutthedirectionofthefindings.（）

答案:對Whenallsubjectsunderstudyareused,thegroupiscalleda（）

答案:PopulationWhattestcanbeusedtotestthedifferencebetweentwosamplemeanswhenthepopulationvariancesareunknown?（）

答案:tWhatisthesumoftheprobabilitiesofalloutcomesinaprobabilitydistribution?（）a.0c.1b.d.Itcannotbedetermined.

答案:1Whatgraphshouldbeusedtoshowtherelationshipbetweenthepartsandthewhole?（）

答案:PiechartWecanuse“sort”codetoorganizethedatabasedonselectedvariablesinthe“sortby”columns（）

答案:對Wecanuse“normalitytest”under“explore”totestthenormaldistributionofdata（）.

答案:對Varianceratiotestisusedtotest（）.

答案:Homogeneityvariancedescribestheaverageofsquaresofthedistancethateachvalueisfromthemean（）.

答案:對Totesttheequalityoftwoproportions,youwouldusea(n)（）test.

答案:zThereareseveraladvantagestotheuseofnonparametricmethods,suchaseasycalculating（）.

答案:對Theztestwithsomemodificationscanbeusedtotesttheequalityoftwoproportions.（）

答案:對Thevaluesofthechi-squarevariablecannotbe（）

答案:NegativeThetotalareaunderanormaldistributionisinfinite（）.

答案:錯(cuò)Thetestisusedtotestmeanswhenthreesamplesareindependentandthenormalityassumptioncannotbemet.（）

答案:Kruskal-WallisThetestisusedtotestmeanswhensamplesaredependentandthenormalityassumptioncannotbemet（）

答案:Wilcoxonsigned-rankThetdistributionissymmetricandbell-shaped.（）

答案:對Thestandardnormaldistributioncanbeusedtotesthypothesesforproportions.（）

答案:對Thestandarderrorofmeanisdescriptingthesamplingerror.（）

答案:對Thesamplingdistributiondependsontheunderlyingdistributionofthepopoluation,thestatisticbeingconsidered,andthesamplesizeused.（）

答案:對Theobservationsarelistedas10,11,15and18.Themedianoftheseobservationsis（）

答案:13Theobservationsare1,5,7,4,2,2,8,whatisthemodeofthisobservation?（）

答案:2Thenumberofhighwaymilespergallonofthe8worstvehiclesisshown.12,15,13,14,15,16,17and18，whatisrangeofthedataset（）.

答案:6Thenumberofadsonaone-hourtelevisionshowiswhattypeofdata?（）

答案:DiscreteThenullhypothesisforthechi-squaretestofindependenceisthatthevariablesare（）.

答案:IndependentThemodeisthevaluethatoccursmostofteninthedataset.（）

答案:對Themean,alsoknownasarithmeticaverage,isusedtodescribethecentraltendencyofdata.（）

答案:對Themeanofthestandardnormaldistributionis（）

答案:0Themeanofbloodpressureinaseriesofboysis120kPa,andthestandarddeviationofthesamedatais10kPa,thecoefficientofvariationofthisdataequals（）

答案:8.3%Themeanforthenumberofpagesofasampleofwomen’sfitnessmagazinesis132,withastandarddeviationof4.79,thecoefficientofvariationis（）.

答案:3.6Themeanandstandardderivationcanbeusedtodescribe（）

答案:NormaldistributeddataThefrequenciesobtainedbycalculationarecalledtheobservedfrequencies（）.

答案:錯(cuò)TheF-testdoesnotusetheconceptofdegreesoffreedom（）

答案:錯(cuò)Theexpenditures(indollars)perpupilforstatesinthreesectionsofthecountryarelisted.Whichmethodcanbeusedtofindthedifferenceamongthemeans（）.

答案:ANOVETheequationoftheregression,whichirepresentsthelineofbestfit,describesowresposevariablevariesbyonlyonepredictor.（）

答案:對Theequationoftheregressionlineusedinstatisticsis（）.

答案:y’=a+bxThedataof15,19,16,11,and14,thenumberofrunswithrespecttothesamplemedianis（）。

答案:15Theconfidenceintervalisusetoestimatethepopulationmean.（）

答案:對Thecoefficientofdeterminationis（）.

答案:r2Thechi-squaretestofindependenceisalwaystwo-tailed（）.

答案:錯(cuò)Thecentraltendencyofuncleardistributionoriginaldatais（）

答案:MedianTheassumptionsforthechi-squaregoodness-of-fittestinclude（）

答案:Thedataareobtainedfromarandomsample；Theexpectedfrequencyforeachcategorymustbe5ormoreThe“splitfiles”canseparatethefilebyacertainvariable（）.

答案:對The“sort”codecannotonlysorttheselectedvariables,butalsosortselectedcase（）

答案:對The“means”procedureisusedtosummarizeandcomparedifferencesindescriptivestatisticsforthequantitativedata（）

答案:對The“comparemeans”procedureisusefulwhenyouwanttosummarizeandcomparedifferencesindescriptivestatisticsacrossoneormorefactorsorcategoricalvariables（）

答案:對t-distributioncanfitwellwithnormaldistributionwhendf=（）

答案:∞Tdistributionisacontinuousprobabilitydistribution.（）

答案:對Surveyisnotasourceofdata.（）

答案:錯(cuò)SPSSisanintegratedsoftwarepackageofcomputerprogramforthestatisticalanalysisofmedicine,socialandeducationaldata（）

答案:對SNKmethodisusedtoprocesspairwisetestaftertheANOVAprocedurehasbeenperformed（）.

答案:對Percentilesdividethedatasetinto100equalgroups.（）

答案:對Pearson’sχ2testisonekindofhypothesistestingmethodforenumerationdatausingχ2valuesasateststatisticbasedonχ2distribution（）.

答案:對Parametrictestsarepreferredovertheirnonparametriccounterparts,iftheassumptionscanbemet（）.

答案:對Pairedsamplest-testisusedtocomparetworelatedmeans（）

答案:對P50correspondsto（）。

答案:Q2Onesamplettestareusedtocompareasinglemeantoafixednumberor"goldstandard".（）

答案:對Nonparametricstatisticscannotbeusedtotestthedifferencebetweentwomeans.（）

答案:錯(cuò)Nonparametricstatisticscannotbeusedtotestthedifferencebetweentwomeans（）

答案:錯(cuò)Nonparametricstatisticscanbeusedtotesthypothesesaboutparametersotherthanmeans,proportions,andstandarddeviations（）.

答案:對Nonparametricstatisticsaremoresensitivethantheirparametriccounterparts（）.

答案:錯(cuò)ItisnecessarytotransfertherawdataintoSPSSfileforlateranalysis（）

答案:對IntheWilcoxontests,thevaluesofthedataforbothsamplesarecombinedandthenranked（）.

答案:對Inthenursinghomestudymentionedinthechapter-openingStatisticsToday,theresearchersfoundthat12outof34smallnursinghomeshadaresidentvaccinationrateoflessthan80%,while17outof24largenursinghomeshadavaccinationrateoflessthan80%.Inordertotestifthereisnodifferenceintheproportionsofthesmallandlargenursinghomeswitharesidentvaccinationrateoflessthan80%（）

答案:z-testInsimplelinearregression,thereareseveraldependentvariablesandoneindependentvariable（）.

答案:錯(cuò)Inordertostudytheroleofafactororcausewhentheobservationsaremadebeforeandafteritsplay,whichstatisticalmethodcanbeconsidered（）.

答案:pairedt-testInordertocomparetheratios(proportions)infoursamples,whichstatisticalanalysiscanbeconsidered（）.

答案:F-testInordertocomparethedegreeofvariationoftheheightandweightinthesamedataset,whichoneisappropriate（）

答案:CoefficientofvariationInordertocomparethedegreeofvarianceofheightandweightinthesamepopulation,whatindexisbettertochoose（）？

答案:CoefficientofvariationInarandomsampleofyoungadults,systolicbloodpressure(SBP)valuesareassumedtofollowanormaldistribution,withameanof115mmHgandastandarddeviation(SD)of8mmHg.WhatistheprobabilitythatapatientrandomlyselectedfromthissamplehasaSBPof99mmHgorless?（）

答案:2.5%Inaprobabilitydistribution,thesumoftheprobabilitiesofalltheventsinthesamplespacemustequal1（）.

答案:對Inaone-samplettest,thenullhypothesisassumesthatthereisnosignificantdifferencebetweenthepopulationmeanwhichthesamplemeanrepresentsandtheknownpopulationmean.（）

答案:對Ifyouwishtotesttheclaimthatthemeanofthepopulationis100,theappropriatenullhypothesisis（）.

答案:μ=100Ifyouwishtotesttheclaimthatthemeanofthepopulationis100,theappropriatenullhypothesisis（）

答案:μ=100IfthenullhypothesisisrejectedinANOVA,youcanusethe（）testtoseewherethedifferenceinthemeansisfound.

答案:SNKorTukeyHowmanyoutcomesarethereinabinomialexperiment?（）

答案:2Histogramscanbedrawnbyusingverticalorhorizontalbars.（）

答案:錯(cuò)Heightsofidenticaltwinsareindependentsamples（）

答案:錯(cuò)FortheassumptionofusingANOVA,whichoneiscorrect（）

答案:AlloftheaboveForresearchhypothesis(H1),thereare（）possibleways.

答案:3Fora4x4table,whatisdegreesoffreedomofChi-squaretest（）.

答案:9Fivesampleswith∑X2=190，∑x=30，then,thestandardderivationare（）

答案:1.58Evenifthecorrelationcoefficientishigh(near+1)orlow(near-1),itmaynotbesignificant（）.

答案:對DatatypeacceptableforIBMSPSSincludesSPSS/PC+file,Excelfileandsoon（）.

答案:對Coefficientofvariationcanbeusedtocomparestandarddeviationswhentheunitsaredifferent（）.

答案:對Chi-squaretestcanbeusedtocompare（）.

答案:populationproportion；goodnessfit；ratioChi-squarecanbeusedtotestgoodnessoffitofdata.（）

答案:對BasedontheShapiro-Wilkmethod,wegottheP=0.032,whatconclusionwecandraw（）

答案:ThedatadonotfollownormaldistributionAssumptionsforusingpaired-ttestare（）.

答案:AllaboveAssumptionsfortheztestfortwoproportionsincluded（）

答案:Thesamplesmustberandomsamples；Thesampledataareindependentofoneanother；Forbothsamplesnp≥5andnq≥5.AssumingalinearrelationshipbetweenXandY,whichofthefollowingistrueifthepopulationcoefficientofregressionequals-0.30?（）

答案:ThevarianceofXisnegativeAreagraphdiagramsareusedtodescribethefrequencydistribution（）.

答案:錯(cuò)Approximatelywhatpercentageofnormallydistributeddatavalueswillfallwithin1standarddeviationaboveorbelowthemean（）

答案:68%ANOVAallowsustolookattheeffectofoneormorefactorsonthedependentvariablebytestinghypothesesabouttheequalmeansofthedependentacrossdifferentgroups（）.

答案:對Analysisofvariance[ANOVA]usesthe（）test.

答案:FAllvariablesthatareapproximatelynormallydistributedcanbetransformedtostandardnormalvariables（）.

答案:對Atwo-sidedtestisastatisticalhypothesistestinwhichthevaluesforwhichthenullhypothesiscanberejectedarelocatedinbothtailsofthedistribution.（）

答案:對Asurveyof1000driversthisyearshowedthat29%ofthepeoplesendtextmessageswhiledriving.Lastyearasurveyof1000driversshowedthat17%ofthosesendtextmessageswhiledriving.Whichmethodisbesttousetestingthedifferencebetweentwoproportions（）.

答案:z-testAseriesofdataarelistedas10,12,9,7,11and39,andwhatismedianofthisseriesofvalue（）

答案:10.5Aprobabilityexperimentisachanceprocessthatleadstowell-definedresultscalledoutcomes.（）

答案:對Apiechartismainlyusedtoshowtheproportionofeachslice.（）

答案:對Aparameterisusedtodescribeasample.（）

答案:錯(cuò)Anon-parametrictestisusedtoanalyzethenormaldistributiondata（）.

答案:錯(cuò)Anegativerelationshipbetweentwovariablesmeansthatforthe