雨课堂学堂在线学堂云《Environmental Data Analysis（内蒙古）》单元测试考核答案

第1题Whichsoftwareareusedinourclass?ARBSigmaplotCRstudioDMatlab正确答案：AC第2题BeforeusinganRpackage,weneedtousefunction()toinstallitfirst.AreadBplotClibraryDinstall.packages第3题Thereare()panelsinRStudio.AoneBtwoCthreeDfour第4题TosetRworkingdirectory,copythefilepath,usebackslash.第5题Basedonthedefinitions,dataisacollectionoffacts.Theycanbenumbers,words,measurements,observationsorjustdescriptionsofthings.第6题Continuousvariablesarenumericvariablesthathaveaninfinitenumberofvaluesbetweenanytwovalues.第7题Therearetwotypesofquantitativevariables.____and____.正确答案：:Discretevariables正确答案：:Continuousvariables第8题Howtorunthecode?AShiftBCtrl+EnterCRunbuttononthetoprightofthetexteditorDEsc正确答案：BC第9题Forwhatisthe‘variableview’inIBMSPSS’sdataeditorused?AEnteringdata.BWritingsyntax.CViewingoutputfromdataanalysis.DDefiningcharacteristicsofvariables.第10题WhichofthenumbersbelowmightIBMSPSSreportas10.574E−05?A0.00010574B10.569C1057400D0000.10574第11题WhichofthenumbersbelowmightIBMSPSSreportas8.96E+03?A89.6B8960C0.00896D8.96第12题Pointoutthecorrectstatement:().ADatahasonlyqualitativevalue.BDatahasbothqualitativeandquantitativevalue.CDatahasonlyquantitativevalue.DNoneoftheabove.第13题Numericalandpictorialinformationaboutvariablesarecalled:().AAnalyticalstatisticsBDescriptivestatisticsCInferentialstatistics第14题Theentiregroupofinterestforastatisticalconclusioniscalledthe:().ADataBPopulationCSample第15题Asubgroupthatisrepresentativeofapopulationiscalled:().AAcategoryBDataCAsample第1题Afactorymanagerobservestheoutput(tons)ofthesameperiodforsixconsecutiveweeks,andthedataisasfollows:110,150,170,210,150,120,calculatethearithmeticmeanandmedianoftheoutput:____,____.(retain2decimalplaces)正确答案：:151.67正确答案：:150第2题Ninehouseholdswererandomlyselectedfromacertaincity,andthedataonthepercapitamonthlyincomeofeachhouseholdwasobtainedbythesurvey:1080,750,780,1080,850,960,2000,1250,1630(unit:yuan),thentheaveragepercapitamonthlyincomeis____,themedianis____.正确答案：:1153.3正确答案：:1080第3题Keepthefollowingfigureswith3significantdigits:3.159:____,13666:____.正确答案：:3.16正确答案：:1.37x104第4题Itisknownthattheresultsofthesamesampletestedbydifferentinstrumentsare:`x1=4.5±0.2,`x2=4.32±0.01,andtheaveragevalueis____.(retain2decimalplaces)正确答案：:4.28第5题Standarddeviationof3.48,3.37,3.40,3.38is____.正确答案：:0.05第6题Howdoestheimagelook?Ifthedataofhistogramconcentrateontherightside.AdarkerBbrighterCblackDnormal第7题Ifwedraganddropinthecumulativehistogramandstretchitdiagonallyintoatriangleshape,wewillgetabalancedblackandwhiteimage.第8题Histogramsdisplaythedistributionofa____variablebydividingtherangeofscoresintoaspecifiednumberofbinsonthex-axisanddisplayingthe____ofscoresineachbinonthey-axis.正确答案：:continuous正确答案：:frequency第9题Anormaldistributioniswithoutany____,asitissymmetricalonbothsides.正确答案：:skewness第10题Abox-and-whiskersplotdescribesthedistributionofacontinuousvariablebyplottingits().AminimumBmaximumClowerquartileDmedianEupperquartile正确答案：ABCDE第11题Alongthey-axisofhistogram,fromlefttorightrepresentstheelevationnumberfromhightolow,andthecoloronthegrayscaleimagechangesfromblacktowhite.第12题They-axisofhistogramrepresentsthenumberofpixelsontheimage第13题Thehistogramdisplaysthepixelvaluesonthex-axisandthecountonthey-axis.第14题Theaverageindexreflectsthegenerallevelofthephenomenon,butitconcealsthedifferencesoftheoverallunits,sothisindexalonecannotfullyreflectthecharacteristicsoftheoverall.第15题Becausethemedianpositionisinthemiddle,soinanarithmeticseriesoranormaldistributionseries,themedianisequaltothearithmeticmean.第16题TheskewnesscoefficientSKisanindexusedtomeasurewhetherthedistributionissymmetricalandskewed,whenSK____,indicatesthatthedistributionissymmetric;whenSK____,indicatesthatthedistributionisskewedtotheright;whenSK____,indicatesthatthedistributionisskewedtotheleft.正确答案：:>0正确答案：:=0正确答案：:<0第17题WecanuseRtocreatesomebasicplots.Theseplotsinclude().AbarplotBhistogramCscatterplotDlineplot正确答案：ABCD第18题Abarplotdisplaysthe____ofacategoricalvariablethroughverticalorhorizontalbars.正确答案：:distribution第19题Intermsoftheoverallfrequencydistribution,if`X-M0>0,thenthedistributionis().ARightskewedBLeftskewedCSymmetricaldistributionDCan'tjudge第20题Thesizeofthestandarddeviationvalueisaffectedby().AThedegreeofchangeintheoverallunitmarkvalue.BTheaveragelevelofthevariableseries.CTheunitofmeasurement.DThenatureofthevariable.EThefrequencydistributionofthevariableseries.正确答案：AE第21题Modeandmedian().AAreallnumericalaverages.BCanbeusedasarepresentativevalueofthegenerallevel.CAreusedtoreflecttheaverageofthecentraltendencyofthevariable.DAverageposition.EArenotaffectedbyextremevariablevalues.正确答案：BCDE第22题Varianceisthemostimportantindicatortomeasurethedegreeofdatavariation.Itistheaverageofthesumofsquareddeviationsofeachdatafromitsarithmeticmean.第23题Thehigherthedegreeofvariationofthevariable,thehighertherepresentativenessofitsaverageindex.第24题Whencomparingthedegreeofdifferenceintheidentificationoftwovariableserieswithdifferentproperties,theanalysisindexthatshouldbecalculatedis().AStandarddeviationBVarianceCTotaldistanceDDispersioncoefficient第25题Add5toalltheflagvaluesofavariable,thenthestandarddeviation().AIncreaseBDecreaseCUnchangedDCan'tjudgeChapterTest-3第1题Usingsamplingsurveydatatoinferquantitativecharacteristicsofthepopulationwillinevitablyleadtosamplingerrors.第2题Whenthelimiterrorissmaller,thenumberofnecessarysampleunitstobedrawnisalsosmaller.第3题Theaveragesamplingerroritselfdoesnotchangewithdifferentsampleestimates.Therefore,theaveragesamplingerrorisnotarandomvariable.第4题InSPSS,whenperformingsimplerandomsampling,weneedtoclick____-____-____.正确答案：:Data正确答案：:Selectcases正确答案：:Randomsampleofcases第5题Accordingtothesamplingdistributiontheoryofsamplevariance,forasimplerandomsamplefromanormalpopulation,thesamplingdistributionobeys()distributionwith(n-1)degreesoffreedom.Aχ2BZCFDt第6题Thesteepnessofthenormalcurvedependsonthesizeofσ,so().AThelargertheσ,thesmootherthenormalcurve.BThesmallertheσ,thesmootherthenormalcurve.CThesmallertheσ,thesteeperthenormalcurve.DThelargertheσ,thesteeperthenormalcurve.ETheaboveACitemsarecorrect.正确答案：ACE第7题Toestimatetheintervalbetweenthetwopopulationmeans,thefollowingfactorsshouldbeconsidered().AIsthesamplesizealargesampleorasmallsample.BWhetherthepopulationobeysanormaldistribution.CIsthepopulationvarianceknown.DIsthesampleanindependentsampleoramatchedsample.EIstheoverallratioknown.正确答案：ABCD第8题Theaveragesamplingerroris().AStandarddeviationofpopulationparametersBSamplestandarddeviationCStandarddeviationofsampleestimatorDAveragedifferenceinsampleestimator第9题Withoutrepeatedsampling,therelationshipbetweenthemathematicalexpectationofthesamplemean`Xandtheoverallmeanμis().AE(`X)=μ/nBE(`X)=μCE(`X)=μ(N-n)/NDE(`X)=μ(N-n)/(N-1)第10题Thesamplemeanisa/an()ofthepopulationmean.AUnbiasedestimatorBBiasedestimatorCNon-uniformestimatorDIneffectiveestimatorChapterTest-4第1题Whatarethewaystodealwithmissingdata?AIgnoreit.BModification.CDeletion.DImputation.正确答案：ACD第2题Generallyspeaking,whatarethetypesofmissingvalues?AMissingcompletelyatrandom.BMissingatrandom.CMissingcompletelyatrandom.DAccidentalmissing.正确答案：ABC第3题Missingvalueswillreducetherepresentativenessofthesample,thuscausingincorrectinferencesaboutthepopulation.第4题Usingthemeantofillinmissingvaluesdoesnotreducethevarianceofthedataset.第5题Findtheoutliersinthegivendatasetbelow.()68,6,74,70,82A6B82C68D70第6题Findtheoutliersinthegivendatasetbelow.()30,29,28,26,1,2,42,44A42,44B1,2C1,26D30,42第7题Whichofthefollowingstatementsaboutoutliersisnottrue?AOutliersarevaluesverydifferentfromtherestofthedata.BInfluentialcaseswillalwaysshowupasoutliers.COutliershaveaneffectonthemean.DOutliershaveaneffectonregressionparameters.第8题Whatistheeffectofanoutlieronthevalueofacorrelationcoefficient?AAnoutlierwillalwaysdecreaseacorrelationcoefficient.BAnoutlierwillalwaysincreaseacorrelationcoefficient.CAnoutliermighteitherdecreaseorincreaseacorrelationcoefficient,dependingonwhereitisinrelationtotheotherpoints.DAnoutlierwillhavenoeffectonacorrelationcoefficient.第9题Whatisanoutlier?AAtypeofvariablethatcannotbequantified.BAcompulsiveliarwhoisproudtobegay.CAscorethatisleftoutoftheanalysisbecauseofmissingdata.DAnextremevalueateitherendofadistribution.第10题Tomeetstatisticalmodelassumptions,theformsofdatastandardizationwecancarryoutare().ANormality.BLinearity.CHomogeneityofvariance.DClusteranalysis.正确答案：ABCDChapterTest-5第1题Assumingthattheprobabilityofoccurrenceofthefirsttypeoferrorandthesecondtypeoferrorinthetwotypesoferrorsinthehypothesistestisαandβ,respectively,therelationshipbetweenthetwois:thelargerα,thelargerβ;thesmallerα,thesmallerβ.第2题Asmallprobabilityeventdoesnotnecessarilyhappen,andahighprobabilityeventdoesnotnecessarilyhappen.第3题Parameterestimationandhypothesistestingarepartofinferentialstatistics.第4题Accordingtotheerrorrepresentationmethod,theerrorisdividedintoabsoluteerrorand().ARelativeerrorBSystemerrorCAccidentalerrorDMethoderror第5题Ifμrepresentstheoverallmeantobetestedandμ0representstheassumedaveragelevel,thehypothesisoftheoverallaveragehasthefollowingsituations:().AH0:μ=μ0;H1:μ¹μ0BH0:μ≥μ0;H1:μ<μ0CH0:μ≤μ0;H1:μ>μ0DH0:μ>μ0;H1:μ<μ0EH0:μ<μ0;H1:μ>μ0正确答案：ABC第6题Thefollowingsituationscandoχ2testorFtest:().ATestforthevarianceofasinglenormalpopulation.BTestforthedifferencebetweentheproportionsofasinglenormalpopulation.CTestforthedifferenceofthemeanofasinglenormalpopulation.DTestforthemeanofasinglenormalpopulation.ESinglenormalpopulationvarianceratiotest.正确答案：AE第7题Whenwedohypothesistesting,wewillmaketwokindsofmistakes:thefirsttypeoferroristhatthenullhypothesisiscorrectandyoujudgeittobewrong;thesecondtypeoferroristhatthenullhypothesisiswrongandyoujudgeittobecorrect.第8题Toreducethechanceofbothtypesoferrorsatthesametime,youcantakethefollowingmeasures:().AIncreasesamplesizen.BReducetheprobabilityofmakingthefirsttypeofmistakeα.CReducetheprobabilityofmakingthesecondtypeofmistakeβ.DDecreasesamplesizen.第9题Inthehypothesistestoftheoverallmean,setthesignificancelevelα=0.05,thecriticalvalueZα/2=Z0.025=1.96,Zα=Z0.05=1.645,thentheacceptancedomainforthetwo-sidedtestandtheleftone-sidedtest.Theaccepteddomainsare:().A-1.96B-1.96F6-1.645CΙZΙ>1.96;Z<-1.645DΙZΙ>1.96;Z>-1.645第10题Smallprobabilityeventsinstatistics:()ATheeventwithP<0.05isthelowprobabilityeventboundary.BTheeventwithP<0.01isthelowprobabilityeventboundary.CEventswithP<0.05arelikelytooccur.DTheeventwithP=0.05isclassifiedasahighprobabilityevent.ENoneoftheabove.正确答案：EChapterTest-6第1题TheWilcoxonsigned-ranktestassumesthatthedataaredistributed____aroundthe____.正确答案：:symmetrically正确答案：:median第2题TheWilcoxontestisanon-parametricalternativetothet-testforcomparingtwomeans.第3题Thepairedsamplet-testisusedtocomparethemeansoftwounrelatedgroupsofsamples.第4题Thedifferenttypesofnon-parametrictest,including().Aone-samplenon-parametrictestBregressionanalysisCindependentsamplesnon-parametrictestDpairedsamplesnon-parametrictest正确答案：ACD第5题One-sample____testisusedtoassesswhetherthemedianofthesampleisequaltoaknownstandardortheoreticalvalue.正确答案：:Wilcoxonsignedrank第6题____isanon-parametricalternativetotheindependenttwosamplest-testforcomparingtwoindependentgroupsofsamples,inthesituationwherethedataarenotnormallydistributed.正确答案：:Wilcoxonranksumtest第7题Thedifferenttypesoft-test,including().Aone-samplet-testBindependentsamplest-testCpairedsamplest-testDthree-samplet-test正确答案：ABC第8题Wecanusefunctionget_summary_statstocomputesummarystatistics,e.g.,____,____and____.正确答案：:count正确答案：:mean正确答案：:standarddeviation第9题Outlierscanbeeasilyidentifiedusingboxplotmethods,implementedintheRfunction____.正确答案：:identify_outliers第10题Thenormalityassumptioncanbecheckedbycomputingthe____test.正确答案：:Shapiro-Wilk第11题Ifthehypothesistestpforthecomparisonofthetwosamplemeansisfarlessthan0.01,itmeansthatthedifferencebetweenthetwopopulationmeansisrelativelylarge.第12题Fortheone-samplet-test,SPSSnormalitytestresults:Z=0.598,P=0.868,itcanbeconsideredthatthesampledoesnotconformtothenormaldistribution.第13题IntheSPSSoperationofindependentsamplettest,wefirstneedtoclick____-____-____.正确答案：:Independent-SamplesT-Test正确答案：:CompareMeans正确答案：:Analyze第14题One-samplet-testisusedtocomparethepopulationmeanofthe____samplewiththeknown____.正确答案：:sample正确答案：:population第15题Samplestatisticsare`X=4.9,s=1.08,andn=24.99%confidenceintervalis().A(4.28,5.52)B(4.34,5.45)C(4.44,5.36)第16题Forthepairedsampletest,itisnecessarytoassume().AThetwopopulationsareindependent.BBothsamplesfollowanormaldistribution.CThesampleisrandomlydrawn.DBoththepopulationsobeythenormaldistribution.正确答案：CD第17题Whichofthefollowingtests()isanexampleofnon-parametricmethod?AT-testBZ-testCSigntestDAlltheabove正确答案：C第18题Thepvaluereflectswhetherthedifferencebetweenthetwopopulationmeansisstatisticallysignificant,anddoesnotindicatethesizeofthedifference.第19题Tworandomsampleshavebeenselectedandatwosamplet‐testforthedifferenceinpopulationmeansisconductedwithH0:μ1=μ2,H1:μ1>μ2.Theresultsares1=2.5,`X1=9.7,n1=30,s2=2.9,`X2=9.1,andn2=35.Thestandarderrorofthesamplingdistributionis().A0.408B0.67C0.947D0.586第20题Tworandomsampleshavebeenselectedandatwosamplet‐testforthedifferenceinpopulationmeansisconductedwithH0:μ1=μ2vs.H1:μ1>μ2.Theresultsares1=2.5,`X1=9.7,n1=30,s2=2.9,`X2=9.1,andn2=35.Thevalueoftheteststatisticis().A0.634B0.896C1.471D0.398第21题Ifa90%confidenceintervalforthepopulationproportionisconstructed,thebestestimateforthestandarderrorofthesamplingdistributionis().A0.068B0.074C2.962D1.256第22题Aonesamplet‐testisconductedonH0:μ=81.6.Thesamplehas`X1=84.1,s=3.1,andn=25.Theteststatisticis().A0.806B1.803C4.032D2.274第23题Comparisonofthetwosamplemeans,thetestresultP>0.05illustrate().AThedifferencebetweenthetwopopulationmeansissmall.BThedifferencebetweenthetwopopulationmeansislarge.CSupporttheconclusionthatthetwopopulationsaredifferent.DDoesnotsupporttheconclusionthatthetwopopulationsaredifferent.第24题Intheoperationofthecomparemeansprocess,select()inthe"independentvariablelist"column.ACategoricalvariables.BCharactervariables.CContinuousnumericalvariables.DTimevariables.第25题Modevaluefordatasetis():0,2,3,5,6,6,6,6,6,7,8,9,10,10,10,10,11,12,14,15,15,15.A6B10C12D15第26题()isthesimplestandmostwidelyusednon-parametrictest.ASigntestBK-StestCChi-squaretestDWilcoxonmatchedpairedtestChapterTest-7第1题ThevalueofFDATAforthistestis:____.正确答案：:5.39第2题Themaingoaloftwo-wayANOVAistoevaluateifthereisastatisticallysignificant____effectbetweentwofactorsinexplainingacontinuousoutcomevariable.正确答案：:interaction第3题Aninteractioneffectoccurswhentheeffectofoneindependentvariableonanoutcomevariabledependsontheleveloftheotherindependentvariables.第4题Wecanuse____and____tochecknormalityassumption.正确答案：:QQplot正确答案：:Shapiro-Wilktest第5题IntheQQplot,asallthepointsfallapproximatelyalongthereferenceline,wecanassumenormality.第6题TheANOVAtestisusedtocomparethe()ofmultiplegroups.AmedianBmeanCpvalueDsum第7题One-wayANOVAisanextensionofthe()forcomparingthemeansinasituationwheretherearemorethantwogroups.Aone-samplet-testBpairedsamplest-testCindependentsamplest-testDone-samplenon-parametrictest第8题BeforecomputingANOVAtest,youneedtoperformsomepreliminaryteststocheckiftheassumptionsaremet,including().AnosignificantoutliersBthedatashouldbeapproximatelynormallydistributedCthevarianceoftheoutcomevariableshouldbeequalDequalsamplesize正确答案：ABC第9题Wecreatea()plotofresidualstochecknormalityassumption.AscreeBQQCpieDhistogram第10题Wecanuse____tocheckthehomogeneityofvariances.正确答案：:theLevene’stest第11题Wecanassumenormalityofthedatawhenpvaluelessthan0.05asassessedbyShapiro-Wilk’stestofnormality.第12题Anydifferenceinpopulationmeansinanalysisofvariancewillinflatetheerrorsumofsquares.第13题ANOVAcannotbeusedwhentestingdatacollectedineducationalresearchasitcannotbeappliedtosocialscience.第14题Inone-wayanalysisofvariance,thesamplesizesdrawnfromdifferentlevelsmustbeequal.第15题InSPSS,toperformatwo-wayANOVA,youshouldclick____--____--____enterthewindow.正确答案：:Univariate正确答案：:GeneralLinearModel正确答案：:Analyze第16题InSPSS,atwo-wayANOVAwithinteractionisperformed,and____--____typeshouldbeselectedinthemodel.正确答案：:Custom正确答案：:Interaction第17题Thenullhypothesisforthisanalysisis:ANotallthefishpopulationshavethesamemean.BAtleastoneofthefishpopulationshasadifferentmean.Cµ1=µ2=µ3Dµ1=µ2=µ3=0ENoneofthese.第18题InANOVA,thereare4groupsdataandatotalsamplesizeis44,thecomputedFstatisticis2.33.Inthiscase,thep-valueis:().AGreaterthan0.05.BExactly0.05.CCannottell–itdependsonwhattheSSEis.DLessthan0.05.第19题What()isvarianceofthedataset:2,10,1,9,and3?A15.5B17.5C5.5D7.5第20题Ifkdenotesthedegreeoffreedom,thenthevarianceofChi-squaredistributionis().Ak/2Bk–1Ck–2D2k第21题Amachineproduces0,1or2defectivepiecesinadaywithanassociatedprobabilityof1/6,2/3and1/6respectively.Themeanvalueandthevarianceofthenumberofdefectivepiecesproducedbythemachineinaday,respectively,are().A1and1/3B1/3and1C1and4/3D1/3and4/3第22题Apersondecidestotossafaircoinrepeatedlyuntilhegetsahead.Hewillmakeatmost3tosses.LettherandomvariableYdenotethenumberofheads.Thevalueofvar{Y},wherevar{.}denotesthevariance,equals().A7/8B49/64C7/64D105/64第23题IfthevalueoftheinspectionquantityFisapproximatelyequalto1,itmeans().AThevariancebetweengroupsdoesnotincludetheinfluenceofsystemfactors.BThewithin-groupvariancedoesnotincludetheinfluenceofsystemfactors.CThebetween-groupvarianceincludestheinfluenceofsystemfactors.DThenullhypothesisshouldberejectedintheanalysisofvariance.正确答案：ABD第24题Thespecificstepsofone-wayanalysisofvarianceare().ACalculateddataerror.BDetermineteststatistics.CDeterminethenullhypothesisandalternativehypothesis.DCalculatethemean.EJudgingthesignificanceandmakingstatisticaldecisions.正确答案：CDABE第25题Inasimpleanalysisofvarianceproblem,whichofthefollowing()isanestimateofthevarianceofindividualmeasurements(afterthevariouseffectshavebeenaccountedfor)?AMS(between).BMS(within).CMS(total).DNoneoftheabove.第26题Amongthefollowingassumptions,whichone()isnotincludedintheassumptionsintheanalysisofvariance?AEverypopulationobeysanormaldistribution.BThevariancesofallpopulationsareequal.CObservationsareindependent.DThevarianceofeachpopulationisequalto0.ChapterTest-8第1题IftwovariablesXandYareindependent,thenthecorrelationcoefficientbetweenthemis____.正确答案：:0第2题Ifthecorrelationcoefficientandcovariancebetweenxandyis0.6and27,andvarianceofyis25,thenthevarianceofxis____.正确答案：:81第3题Theregressioncoefficientsofabivariatedistributionare-0.64and-0.36.Thenthecorrelationcoefficientofthedistributionis____.正确答案：:-0.48第4题Ifthesumofthesquaresofdifferenceofranksof6candidatesintwocriteriais21,therankcorrelationcoefficientis____.正确答案：:0.4第5题Giventhatr=0.42,cov(x,y)=10.5,var(x)=16;thestandarddeviationofyis____.正确答案：:6.25第6题Ifthep-valueofMoran'sIisstatisticallysignificant,andthez-scoreispositive,itmeansThespatialdistributionofhighvaluesand/orlowvaluesinthedatasetismorespatially______AclusteredBdispersedCrandomDlayered第7题Ifthep-valueofMoran'sIisstatisticallysignificant,andthez-scoreisnegative,itmeansThespatialdistributionofhighvaluesand/orlowvaluesinthedatasetismorespatially______AclusteredBdispersedCrandomDlayered第8题Ifthep-valueisnotstatisticallysignificant,itmeansThespatialdistributionofhighvaluesand/orlowvaluesinthedatasetisspatially______AclusteredBdispersedCrandomDlayered第9题Moran'sIevaluateswhetherthepatternexpressedisclustered,dispersed,orrandom.第10题ThemajordifferencebetweenMoran'sIandPearson'scorrelationisthatweonlyhaveonerandomvariableXinPearson'scorrelationequation,buttwovariablesasXandYinMoran'sI.第11题Kendallrankcorrelationtestmaybeusedifthedatadonotnecessarilycomefromabivariatenormaldistribution.第12题A____correlationdeterminesthelinearrelationshipbetweentwovariableswhenaccountingforoneormoreothervariables.正确答案：:partial第13题Youcanusefunction____and____plottovisualizedata.正确答案：:ggscatter正确答案：:scatter第14题Youcanusefunction____torunthepartialcorrelationanalysis.正确答案：:pcor.test第15题Thepartialcorrelationco-efficientvariesbetween-1and+1.第16题Thecalculationofpartialcorrelationco-efficientisbasedonthesimplecorrelationco-efficient.第17题Whichofthefollowingindicatesthestrongestrelationship?A

r=0.08B

r=0.5

C

r=-0.6

D

r2=

0.2第18题____isusedtoevaluatetheassociationbetweentwoormorevariables.正确答案：:Correlationtest第19题Thedifferentcorrelationmethods,including____,____,and____.正确答案：:Pearsoncorrelation正确答案：:Kendallrankcorrelation正确答案：:Spearmanrankcorrelation第20题Pearsoncorrelationcanbeusedonlywhenxandyarefromnormaldistribution.第21题Weneedtodosomepreliminarytesttocheckthetestassumptions().AIsthecovariationlinear?BArethedatafromeachofthe2variables(x,y)followanormaldistribution?CheterogeneityDequalsample正确答案：AB第22题Ifthecorrelationcoefficientis0.8,thepercentageofvariationintheresponsevariableexplainedbythevariationintheexplanatoryvariableis().A0.008B0.8C0.0064D0.64第23题Fromtheperspectiveofthedegreeofcorrelationofvariables,thecorrelationcanbedividedinto().ATotallyrelated.BLinearcorrelation.CIrrelevant.DSimplecorrelation.ENotcompletelyrelevant.正确答案：ACE第24题Partialcorrelationcoefficientistocalculatethecorrelationcoefficientbetweenvariablesafterexcludingtheinfluenceofothervariables.第25题Thereisasamplingerrorbetweenthesamplecorrelationcoefficientandtheoverallcorrelationcoefficient.第26题TorunapartialcorrelationsinSPSS,click____--____--____.正确答案：:Analyze正确答案：:Correlate正确答案：:Partial第27题WhenperformingcorrelationtestsinSPSS,wehavethreeoptionsforcorrelationcoefficientanalysis:____,____,____.正确答案：:Spearman正确答案：:Kendall正确答案：:Pearson第28题Thecovarianceis():AAllofthese.BAmeasureofthestrengthofrelationshipbetweentwovariables.CDependentontheunitsofmeasurementofthevariables.DAnunstandardizedversionofthecorrelationcoefficient.第29题TheCoefficientofCorrelationisindependentof().AOriginonly.BThescaleofMeasurementonly.CBothchangeoforiginandscaleofmeasurement.DNoneofthese.第30题The

CoefficientofCorrelation

between

U=X

and

V=−X

is().A1B-1C0D0.5第31题IfthecorrelationcoefficientbetweenthevariablesXandYisρ,thecorrelationcoefficientbetweenX2andY2is().AρBρ2C1第32题Homogeneityofthreeormorepopulationcorrelationcoefficientscanbetestedby().AT-testBZ-testCχ2-testDF-testChapterTest-9第1题Iftheregressioncoefficientofxonyandyonxareandrespectively,thenthecorrelationcoefficientbetweenxandyis____.正确答案：:-0.25第2题Thedifferentsolutionsextendingthelinearregressionmodelforcapturingthenonlineareffects,including().ALinearregressionBPolynomialregressionCSplineregressionDGeneralizedadditivemodels正确答案：BCD第3题Thecoefficientofcorrelationwhencoefficientsofregressionare0.2and1.8is____.正确答案：:0.6第4题Inthisspacaltrendanalysisexample,weset____as"Zvaluefield"正确答案：:temperature第5题Conceptually,trendinterpolationisliketakingapieceofpaperandfittingitbetweenraisedpoints第6题Imagetrendanalysistakesthecoordinatesx-axisandy-axisasvariables第7题if"Polynomialorder"issetas1,thetypeofregressionis______AlinearregressionBlogisticregressionCbayesianlinearregressionDridgeregression第8题Trendresultsinasmoothsurfacethatrepresentsgradualtrendsinthesurfaceovertheareaofinterest.第9题Weusenon-linearregressionmodelswhenthetruerelationshipbetweentheoutcomeandapredictorvariableisnotlinear.第10题The____andthe____metricscanbeusedtocomparethedifferentmodels.正确答案：:RMSE正确答案：:R2第11题Thebestmodelisthemodelwiththe____RMSEandthe____R2.正确答案：:lowest正确答案：:highest第12题Whenyouhaveanon-linearrelationship,youcantrya____transformationofthepredictorvaria