第1題Thesummariesofdata,whichmaybetabular,graphical,ornumerical,arereferredtoas()AstatisticalinferenceBdescriptivestatisticsCstatisticalinferenceDreportgeneration第2題Theproceduresofanalyzingsampledatainordertodrawconclusionsaboutthecharacteristicsofapopulationiscalled()AdescriptivestatisticsBinferentialstatisticsCdataanalysisDdatasummarization第3題Apopulationis()AthesameasasampleBtheselectionofarandomsampleCthecollectionofallitemsofinterestinaparticularstudyDalwaysthesamesizeasthesample第4題Celsiustemperatureisanexampleofavariablethatuses()AtheintervalscaleBtheratioscaleCtheordinalscaleDeithertheratioortheordinalscale第5題Genderisanexampleofa()AqualitativevariableBquantitativevariableCqualitativeorquantitativevariableDNoneofthesealternativesiscorrect.第6題Incomeisanexampleof()AnominalscaleBordinalscaleCintervalscaleDratioscale第7題Dataarealwaysbenumeric.()第8題Aportionofthepopulationselectedtorepresentthepopulationiscalledasample.()第9題Ordinaryarithmeticoperationsaremeaningfuleitherwithquantitativeorqualitativedata.()第10題Theordinalscaleofmeasurementhasthepropertiesoftheratioscale.()

第1題Afrequencydistributionis().AatabularsummaryofasetofdatashowingtherelativefrequencyBagraphicalformofrepresentingdataCatabularsummaryofasetofdatashowingthefrequencyofitemsineachofseveralnonoverlappingclassesDagraphicaldeviceforpresentingqualitativedata第2題Qualitativedatacanbegraphicallyrepresentedbyusinga()AhistogramBfrequencypolygonCogiveDbargraph第3題Therelativefrequencyofaclassiscomputedby()AdividingthemidpointoftheclassbythesamplesizeBdividingthefrequencyoftheclassbythemidpointCdividingthesamplesizebythefrequencyoftheclassDdividingthefrequencyoftheclassbythesamplesize第4題Thesumoffrequenciesforallclasseswillalwaysequal()A1BthenumberofelementsinadatasetCthenumberofclassesDavaluebetween0and1第5題Acumulativerelativefrequencydistributionshows()AtheproportionofdataitemswithvalueslessthanorequaltotheupperlimitofeachclassBtheproportionofdataitemswithvalueslessthanorequaltothelowerlimitofeachclassCthepercentageofdataitemswithvalueslessthanorequaltotheupperlimitofeachclassDthepercentageofdataitemswithvalueslessthanorequaltothelowerlimitofeachclass第6題Ahistogramis()AagraphicalpresentationofafrequencyorrelativefrequencydistributionBagraphicalmethodofpresentingacumulativefrequencyoracumulativerelativefrequencydistributionCthehistoryofdataelementsDthesameasapiechart第7題Theobjectiveofconstructingthefrequencydistributionistoprovideinsightsaboutthedatathatcannotbequicklyobtainedbylookingonlyattheoriginaldata.()第8題Thesumoftherelativefrequenciesforallclasseswillalwaysequalthesamplesize()第9題Thetotalnumberofdataitemswithavaluelessthantheupperlimitfortheclassisgivenbythecumulativefrequencydistribution.()第10題Ahistogramissaidtobeskewedtotherightifitstailextendsfarthertotheleft()

Chapter3task第1題Whichofthefollowingprovidesameasureofcentraltendencyforthedata?(

)AstandarddeviationBmeanCvarianceDrange第2題Ifadatasethasanevennumberofobservations,themedian()AcannotbedeterminedBistheaveragevalueofthetwomiddleitemsCmustbeequaltothemeanDistheaveragevalueofthetwomiddleitemswhenallitemsarearrangedinascendingorder第3題Whichofthefollowingisameasureofdispersion?()ApercentilesBquartilesCinterquartilerangeDalloftheabovearemeasuresofdispersion第4題Theinterquartilerangeisusedasameasureofvariabilitytoovercomewhatdifficultyoftherange?()AthesumoftherangevariancesiszeroBtherangeisdifficulttocomputeCtherangeisinfluencedtoomuchbyextremevaluesDtherangeisnegative第5題Thecoefficientofvariationis()AthesameasthevarianceBtheratioofthestandarddeviationtothemeanCthesquareofthestandarddeviationDthemeandividedbythestandarddeviation第6題Inafivenumbersummary,whichofthefollowingisnotusedfordatasummarization?()AthesmallestvalueBthelargestvalueCthemeanDthe25thpercentile第7題Rangeisthemeasureofdispersionthatisinfluencedmostbyextremevalues.()第8題Whenthedataareskewedtotheright,themeasureofSkewnesswillbenegative.()第9題Sincethemodeisthemostfrequentlyoccurringdatavalue,itcanneverbelargerthanthemean.()第10題Thesamplemeanisalwayssmallerthanthemeanofthepopulationfromwhichthesamplewastaken.()

Chapter4task第1題Inbinomialdistribution,if“n”isanumberoftrialsand“p”istheprobabilityofsuccess,thenthemeanvalueisgivenby().AnpBnCpDnp(1-p)第2題InaBinominalDistribution,ifp,qandnareprobabilityofsuccess,failureandnumberoftrialsrespectivelythenvariancegivenby()AnpBnpqCnp2qDnpq2第3題Binomialdistributionisa()AContinuousdistributionBDiscretedistributionCIrregulardistributionDNotaprobabilitydistribution第4題Thescientistin1657publishedthefirstbookonprobabilityentitled

DeRatiociniisinLudoAleaewas(

).AJohnMaynardKeynesBChristianHuygensCAndreiMarkovDPierredeFermat第5題Assumethatyouhaveabinomialexperimentwithp=0.5andasamplesizeof100.Theexpectedvalueofthisdistributionis()A0.50B0.30C100D50第6題Theshapeofthenormalcurvedependsonits()AMeandeviationBStandarddeviationCQuartiledeviationDCorrelation第7題Inabinomialdistribution,themeanandvarianceareequal()第8題PierredeFermatthroughhiscorrespondencewith

BlaisePascal

wasaco-founderofthetheoryofprobability.()第9題Theprobabilityofsuccessforabinomialexperiment,denoted

p,isthesameforeachtrial.()第10題Anormaldistributionwithameanof0andastandarddeviationof1iscalledastandardnormaldistribution.()

Chapter5task第1題Whatdoesthecentrallimittheoremstate?()AifthesamplesizeincreasessamplingdistributionmustapproachnormaldistributionBifthesamplesizedecreasesthenthesampledistributionmustapproachnormaldistributionCifthesamplesizeincreasesthenthesamplingdistributionmuchapproachanexponentialdistributionDifthesamplesizedecreasesthenthesamplingdistributionmuchapproachanexponentialdistribution第2題Probabilitysamplingmethodsnotinclude(

)AsimplerandomsamplingBsystematicsamplingCstratifiedsamplingDconveniencesampling第3題Asthesamplesizeincreases,the()AstandarddeviationofthepopulationdecreasesBpopulationmeanincreasesCstandarderrorofthemeandecreasesDstandarderrorofthemeanincreases第4題Whatisnotcharacterizedclustersampling?()AEachclustershouldbeasmall-scalerepresentationofthetotalpopulation.BTheclustersshouldbemutuallyexclusiveandcollectivelyexhaustiveCArandomsamplingtechniqueisthenusedonanyrelevantclusterstochoosewhichclusterstoincludeinthestudyDInsingle-stageclustersampling,alltheelementsfromeachoftheselectedclustersarenotsampled.第5題Samplingerroris()Atheresultofusingasubsetofthepopulation(thesample),andnottheentirepopulationBthedifferencebetweenparameterandsampleCtheresultofusingasubsetofthepopulation(thesample),andnottheparameterDthedifferencebetweensampleandparameter第6題Thesamplinginterval(sometimesknownastheskip):thisiscalculatedas(),wherenisthesamplesize,andNisthepopulationsize.Ak=N*nBk=N/nCk=n/NDk=n/30第7題Theshapeofthesamplingdistributionofsamplemeanisalwaysnormalwhenthepopulationshapeisnormal()第8題Theprobabilitydistributionofallpossiblevaluesofthesampleproportionisthe

samplingdistributionofsampleproportion.()第9題Standarderrorisalwaysnon-negative.(

)第10題The

centrallimittheoremisatheoremthatgivesusawaytoturnanon-normaldistributionintoanormaldistribution.()Chapter6task第1題About“Samplemean”and“populationmean”,whichiscorrect?()ATheformerisadefinitevalue,thelatterisarandomvariableBTheformerisarandomvariable,thelatterisadefinitevalueCBotharerandomvariablesDBotharedefinitevalues第2題100(1-α)%is(

)ASignificantlevelBConfidencelevelCConfidenceIntervalDNoneoftheabove第3題Parameterestimationcanbedividedinto()APointestimationandunbiasedestimationBUnbiasedestimationandintervalestimation’CPointestimationandefficientestimationDPointestimationandintervalestimation第4題Theintervalestimationisa()AAbsolutelyreliablerangeBPossiblerangeCAbsolutelyunreliablerangeDImpossiblerange第5題Under()situation,wecanusetdistributiontoconstructtheconfidenceinterval.

AThepopulationisnormaldistributionandtheisknownBThepopulationisnormaldistributionandtheisunknownCThepopulationisnotnecessarilynormaldistributionDThepopulationisnotnecessarilynormaldistribution,andthetheisknown第6題AandBaretwounbiasedestimators.IfthevarianceofestimatorAislessthanthatofestimatorB,itiscalledthat()AAismoreefficientthanBBBismoreefficientthanACAismoreconsistentthanBDBismoreconsistentthanA第7題Whenotherconditionsremainunchanged,thelengthoftheconfidenceintervaldecreaseswhenthesignificantlevelαbecomeslarger.(

)第8題SupposeX~N(),isknown,ifthesamplesizeandthesignificantlevelkeepunchanged,thenwhenincreases,thelengthoftheconfidenceintervalforthepopulationwillbechanged.(

)第9題Sampleswiththesizeof4,16and36areextractedfromtheinfinitepopulationsubjecttonormaldistributionrespectively.Whenthesamplesizeincreases,thestandarddeviationofthesamplemeanwillincrease.(

)第10題Thegeneralformforconfidenceintervalsis“pointestimator±m(xù)arginoferror”.()

Chapter7task第1題Nullandalternativehypothesesarestatementsabout()Apopulationparameters.Bsampleparameters.Csamplestatistics.Ditdepends-sometimespopulationparametersandsometimessamplestatistics.第2題Aresultiscalled“statisticallysignificant”whenever(

)AThenullhypothesisistrue.BThealternativehypothesisistrue.CThep-valueislessorequaltothesignificancelevel.DThep-valueislargerthanthesignificancelevel.第3題Whichofthefollowingisnotacorrectwaytostateanullhypothesis?()A:B:C:D:p=0.5第4題Matchth