江西财经大学试卷B1(1).doc

江西财经大年夜学试卷试卷代码：06003B课程学时：48课程名称：统计学有用东西：、SINGLECHOICE(1×55)1.Whichofthefollowingisqualityindex?( ) A.Grosscostofliving indexB.indexofstaffpopulationC.indexofconsumerlevelofeachperson D. quantitysoldindex 2.Whatrelationcanweillustratefromthesituationthatanapproximateconstantchangeinyisassociateswithaquantitativechangeinx.()A.PositivelinearcorrelationB.NegativelinearcorrelationC. LinearcorrelationD.  Curvilinearcorrelation3.Dividingthesurveyobjectsintosomegroups,thensamplingrandomlyfromeachgroup,wecalledthismethod.()A. equidistantsampling B. clustersampling C. stratifiedsampling D. purerandomsampling4.Whatistheyearsaverageincreasingratewhentheincreasingratesofrecentthreeyearswere7%、9%、11%?()A. 9% B. 8.8493% C. 8.9878% D. 10% 5.Whichofthefollowingisstandarderroroftheproportionifthequalifiedrateoftheproductsis90%?()A. 10% B. 90% C. 9% D. 30% 、JUDGE(Write“Tfortrueand“Fforfalse.1×55)1.Rangeisequaltowidthoftheclassesmultiplythenumberofclassesatanystatisticalclassification.()2.Marginoferrorisgenerallylargerthanthestandarderrorofthesamplingstatistics.()3.TheformulaofPaascheindexweightforeachitemisitsbase-periodquantity.()4.CorrelativecoefficientiszeroimpliesthatthereisnoCorrelationrelationshipbetweenvariables.()5.Whetheritisanalysisofcorrelationoranalysisofregression,wemustdetermineindependentvariableanddependentvariable.()、SIMPLEANSWER5×2=101、Brieflydescribetherelationshipamongcoefficientofcorrelation、coefficientofregressionandcoefficientofdiscrimination,andexpressituseformula.2、BrieflydescribethecharacteristicsofLaspeyersindexandPaascheindex.、CALCULATIONTotal:60Arandomsampleofsize440acresisselectedfromavillagesrice,theresultoftestisthatthemeanproductionis450Kgandsamplestandarddeviationis80kg.Requirementsare:CalculatethesamplingstandarderrorofthemeanproductionEstimatethemeanproductionofwholevillagesriceata95.45%probability.Ifweselectthesamplefromanothervillage,howlargeasampleshouldbeselectedtoprovidetheconfidenceindicates=2withamarginoferrornotexceeding10kg,assumethatthestandarderrorofperacreis80kg?252、Thedataofcarsproductionofanautomobilemanufacturerinrecentyearsaregivenasfollows:Year200020012002200320042005Quantity100020004000500070009000Pleaseworkouttheparametersaandbaccordingtothesedata,writeoutthetrendequationbyusingtheleastsquaresmethod,andexplaintheeconomicmeaningofb.153、Thedataofthequantityandpriceinamanufactureraregivenasfollows:productsNamequantitypriceQ0Q1P0P1taitonpiece20050015025055018050010002006001100210Pleasetrytoanalyzethechangeinthegrossvalueofoutputfromtwoaspects-relativenumberandabsolutenumberbyfactoranalysis.20、CASEPROBLEM(20)Doesageaffectunemployment?EachmonththeU.S.BureauofLaborStatisticspublishesavarietyofunemploymentstatistic,includingthenumberofindividualswhoareunemployedandthemeanlengthoftimetheindividualshavebeenunemployed.ForNovember2005,theBureauofLaborStatisticsreportedthatthenationalmeanlengthoftimeofunemploymentwas14.6weeks.TheMayorofNewYorkhasrequestedastudyonthestatusofunemploymentinNew Yorkarea.Asampleof50unemployedresidentsofNew Yorkincludeddataontheageandthenumberofweekswithoutajob.AportionofthedatacollectedinNovember2005isshownasfollows:age(years)Weeksofunemployment(week)age(years)Weeksofunemployment(week)2525252626282832334040404546474851217410151215151418201825284848494949505050525354555556575813242525302535364040424545435052Questionsare：.DescribethepopulationscharacteristicsoftheunemployedinNewYorkindescriptivestatisticaldata.Developa95%confidenceintervalestimateofthemeanageofunemployedindividualsinNew York.ConductahypothesistesttodeterminethemeandurationofunemploymentinNew Yorkisgreaterthanthenationalmeandurationof14.6weeks.Usea0.05levelofsignificance.Whatisyourconclusion?.Istherearelationshipbetweentheageofanunemployedindividualandthenumberofweeksofunemployment?Explain.