統(tǒng)計(jì)學(xué)期末考試試卷B-英文版

財(cái)經(jīng)大學(xué)07－08第一學(xué)期期末考試試卷試卷代碼：12083B授課課時(shí)：48課程名稱(chēng)：統(tǒng)計(jì)學(xué)適用對(duì)象：掛牌試卷命題人試卷審核人Ⅰ、SINGLECHOICE(1′×10＝10′)1、Whichstatisticsisusuallyusedwhenwecomparethedeviationdegreeoftwogroupsdatawithdifferentmean?()ArangeBaveragedeviationCstandarddeviationDcoefficientofvariation2、Whichofthefollowingaveragetargetsisnotaffectedbytheextremevalues?()A、ArithmeticalmeanB、GeometricmeanC、HarmonicmeanD、Median3、Comparestratifiedsamplingandothersamplingmethods,whenthesamplesizeisequal,thesamplingerrorofstratifiedis()AlargerBsmallerCbeequalDreverse4、Theconsumepriceindexreflects()AthechangingtendencyandlevelofthecommodityretailpriceBthechangingtendencyandlevelofthepriceofinhabitantpurchasetheconsumegoodsCthechangingtendencyandlevelofthepriceinhabitantpurchaseserviceitemDthechangingtendencyandlevelofthepriceinhabitantpurchasetheconsumegoodsandserviceitem5、Inparameterestimate,wemustestimatethepopulationparameterbythesample,oneofthestandardevaluatethestatisticsisthedeviationissmallerisbetter,thisstandardis()AWithoutbiasBEffectivenessCConsistencyDAdequacy6、Intheregressionmodel，reflects()AthelinearchangeofycausedbythechangeofxBthelinearchangeofxcausedbythechangeofyCtheeffectofrandomfactorstoyexceptthelinearrelationofxandyDtheeffectofthelinearrelationofxandy7、Simplesamplingn=50randomlyfromapopulationwhichthemeanis100,thestandarddeviationis10,theexpectationandvarianceofthesample’smeanare()A100and0.2B100and2C10and1.4D10and28、Theestimatevalueoftheslopeoftheregressionlineis1.23,andthecenterofthesamplesis(4,5),theequationoftheregressionlineis()A=1.23x＋4B=1.23x+5C=1.23x+0.08D=0.08x+1.239、Whatistheyear′saverageincreasingratewhentheincreasingratesofrecentthreeyearswere7%、9%、11%?()A.

9%

B.

8.8493%

C.

8.9878%

D.

10%

10、Therearethreeblockproducts,thepercentofwastesjustas1.5%、2%、1%,therespectivequantitiesofwastesare25、30and45pieces.Thenwhatistheaveragerateofwaste.()ABCD Ⅱ、JUDGE(Write“T”fortrueand“F”forfalse.1′×10＝10′)1、Rangeisequaltowidthoftheclassesmultiplythenumberofclassesatanystatisticalclassification.()2、Marginoferrorisgenerallylargerthanthestandarderrorofthesamplingstatistics.()3、TheformulaofPaascheindexweightforeachitemisitsbase-periodquantity.()4、CorrelativecoefficientiszeroimpliesthatthereisnoCorrelationrelationshipbetweenvariables.()5、Whetheritisanalysisofcorrelationoranalysisofregression,wemustdetermineindependentvariableanddependentvariable.()6、Enlargethedifferencebetweengroupsandnarrowdifferencewithingroupsisthecommontenetwhichiscompliedatanystatisticalclassification.()7、ThedistributionofpopulationbyageisaJ–shapeddistribution.()8、Indexandrelativenumberaretwodifferentnotions;Weshouldnotthinkthattheyareequaltoeachother.()9、In2006,thesameamountofRMBinacitycanonlybuy94%ofgoodscomparedwith2005,thenthepriceincreasedby6%()10、Weightedaverageindexistheweightedmeanofindividualindex.()Ⅲ、SIMPLEANSWER（5′×2=10′）1、Brieflydescribethedifferencesbetweencross-sectionalandtimeseriesdata.2、Pleaselisttheaveragetargetsyouhavelearned.Ⅳ、CALCULATION（15′×3=45′）1、Sample10adultsand10childrenrandomlybyreplacementsampling,surveytheheights(cm)ofthem,theresultsareasfollows:(15’)adults166169172177180170172174168173children68696870717372737475(1)Ifwewanttocomparethedifferenceofheightbetweentheadultgroupandchildrengroup,whichsurveyindexshouldbechose,why?(2)Analyzewhichgroup’sdisparityislargeradoptcalculate.(3)Assumetheheightofadultobeynormaldistribution;providea95%confidenceintervalfortheaverageheightofadult.2、Amagazinesubjectedinentertainmentclaimsthat80%ofitsreadersarefemale.Inordertotestandverifywhetherthiswordingisright,newspublishmanagebranchsampled200peoplerandomlyfromthereadersandfoundthat146womenoftenreadthismagazine.Ata0.05levelofsignificance,dothesampledataindicatethattheproportionofwomenreaderis80%?Inintervalestimate,howmanysamplesmustwesampleifwewantthemarginoferrordecreasesto40%oforiginal?(15’)3、Pleasecompilethequantityindex、priceindexandtotalchangeindexofthreeproductsaccordingtothefollowingdata,andthenanalyzethechangeinthevalueofoutputusetheindexsystem.(15’)ThenameofproductTotaloutputvalue（10000yuan）Individualquantityindex（%）base-periodreport-periodABC180015008002000180010009095100ⅴ、CASEPROBLEM（25′）AsurveyoftheresultsofpassengerscomplainingtheCivilAviationAseconomydeveloping,peoplechoosetakeplainmoreandmore.Buttheattendantproblemispassengerscomplainedtheairlinesmorefrequently.Thisphenomenoncausedahighdegreeattentionofthemanagedepartment.Sothemanagedepartmentsampled10airlinesrandomlyandconductedthissurvey.Afterthissurvey,wefindoutthenumberofcomplaintsisrelatestothepercentageofflightsarrivingontime.Thedataaregivenas