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

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

r=0.08B

r=0.5

C

r=-0.6

D

r2=

0.2第18题填空题(1分)____isusedtoevaluatetheassociationbetweentwoormorevariables.正确答案：:["Correlationtest"]第19题填空题(3分)Thedifferentcorrelationmethods,including____,____,and____.正确答案：:["Pearsoncorrelation"]正确答案：:["Kendallrankcorrelation"]正确答案：:["Spearmanrankcorrelation"]第20题判断题(1分)Pearsoncorrelationcanbeusedonlywhenxandyarefromnormaldistribution.第21题多选题(2分)Weneedtodosomepreliminarytesttocheckthetestassumptions().AIsthecovariationlinear?BArethedatafromeachofthe2variables(x,y)followanormaldistribution?CheterogeneityDequalsample正确答案：AB第22题单选题(1分)Ifthecorrelationcoefficientis0.8,thepercentageofvariationintheresponsevariableexplainedbythevariationintheexplanatoryvariableis().A0.008B0.8C0.0064D0.64第23题多选题(2分)Fromtheperspectiveofthedegreeofcorrelationofvariables,thecorrelationcanbedividedinto().ATotallyrelated.BLinearcorrelation.CIrrelevant.DSimplecorrelation.ENotcompletelyrelevant.正确答案：ACE第24题判断题(1分)Partialcorrelationcoefficientistocalculatethecorrelationcoefficientbetweenvariablesafterexcludingtheinfluenceofothervariables.第25题判断题(1分)Thereisasamplingerrorbetweenthesamplecorrelationcoefficientandtheoverallcorrelationcoefficient.第26题填空题(3分)TorunapartialcorrelationsinSPSS,click____--____--____.正确答案：:["Analyze"]正确答案：:["Correlate"]正确答案：:["Partial"]第27题填空题(3分)WhenperformingcorrelationtestsinSPSS,wehavethreeoptionsforcorrelationcoefficientanalysis:____,____,____.正确答案：:["Spearman"]正确答案：:["Kendall"]正确答案：:["Pearson"]第28题单选题(1分)Thecovarianceis():AAllofthese.BAmeasureofthestrengthofrelationshipbetweentwovariables.CDependentontheunitsofmeasurementofthevariables.DAnunstandardizedversionofthecorrelationcoefficient.第29题单选题(1分)TheCoefficientofCorrelation