江西财经大学试卷B1(1).doc

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1、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(155)1.Whichofthefollowingisqualityindex?()A.GrosscostoflivingindexB.indexofstaffpopulationC.indexofconsumerlevelofeachpersonD.quantitysoldindex2.Whatrelationcanweillustratefromthesituationthatanapproximateconstantchangeinyisassociateswithaquanti

2、tativechangeinx.()A.PositivelinearcorrelationB.NegativelinearcorrelationC.LinearcorrelationD.Curvilinearcorrelation3.Dividingthesurveyobjectsintosomegroups,thensamplingrandomlyfromeachgroup,wecalledthismethod.()A.equidistantsamplingB.clustersamplingC.stratifiedsamplingD.purerandomsampling4.Whatisthe

3、yearsaverageincreasingratewhentheincreasingratesofrecentthreeyearswere7%、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.155)1.Rangeisequaltowidthoftheclassesmultiplyth

4、enumberofclassesatanystatisticalclassification.()2.Marginoferrorisgenerallylargerthanthestandarderrorofthesamplingstatistics.()3.TheformulaofPaascheindexweightforeachitemisitsbase-periodquantity.()4.CorrelativecoefficientiszeroimpliesthatthereisnoCorrelationrelationshipbetweenvariables.()5.Whetherit

5、isanalysisofcorrelationoranalysisofregression,wemustdetermineindependentvariableanddependentvariable.()、SIMPLEANSWER52=101、Brieflydescribetherelationshipamongcoefficientofcorrelation、coefficientofregressionandcoefficientofdiscrimination,andexpressituseformula.2、BrieflydescribethecharacteristicsofLas

6、peyersindexandPaascheindex.、CALCULATIONTotal:60Arandomsampleofsize440acresisselectedfromavillagesrice,theresultoftestisthatthemeanproductionis450Kgandsamplestandarddeviationis80kg.Requirementsare:CalculatethesamplingstandarderrorofthemeanproductionEstimatethemeanproductionofwholevillagesriceata95.45

7、%probability.Ifweselectthesamplefromanothervillage,howlargeasampleshouldbeselectedtoprovidetheconfidenceindicates=2withamarginoferrornotexceeding10kg,assumethatthestandarderrorofperacreis80kg?252、Thedataofcarsproductionofanautomobilemanufacturerinrecentyearsaregivenasfollows:Year20002001200220032004

8、2005Quantity100020004000500070009000Pleaseworkouttheparametersaandbaccordingtothesedata,writeoutthetrendequationbyusingtheleastsquaresmethod,andexplaintheeconomicmeaningofb.153、Thedataofthequantityandpriceinamanufactureraregivenasfollows:productsNamequantitypriceQ0Q1P0P1taitonpiece200500150250550180

9、50010002006001100210Pleasetrytoanalyzethechangeinthegrossvalueofoutputfromtwoaspects-relativenumberandabsolutenumberbyfactoranalysis.20、CASEPROBLEM(20)Doesageaffectunemployment?EachmonththeU.S.BureauofLaborStatisticspublishesavarietyofunemploymentstatistic,includingthenumberofindividualswhoareunempl

10、oyedandthemeanlengthoftimetheindividualshavebeenunemployed.ForNovember2005,theBureauofLaborStatisticsreportedthatthenationalmeanlengthoftimeofunemploymentwas14.6weeks.TheMayorofNewYorkhasrequestedastudyonthestatusofunemploymentinNew Yorkarea.Asampleof50unemployedresidentsofNew Yorkincludeddataonthea

11、geandthenumberofweekswithoutajob.AportionofthedatacollectedinNovember2005isshownasfollows:age(years)Weeksofunemployment(week)age(years)Weeksofunemployment(week)2525252626282832334040404546474851217410151215151418201825284848494949505050525354555556575813242525302535364040424545435052Questionsare：.De

12、scribethepopulationscharacteristicsoftheunemployedinNewYorkindescriptivestatisticaldata.Developa95%confidenceintervalestimateofthemeanageofunemployedindividualsinNew York.ConductahypothesistesttodeterminethemeandurationofunemploymentinNew Yorkisgreaterthanthenationalmeandurationof14.6weeks.Usea0.05levelofsignificance.Whatisyourconclusion?.Istherearelationshipbetweentheageofanunemployedindividualandthenumberofweeksofunemployment?Explain.