应用统计学 作业 3页

Ⅰ.学号统计学管理学101优优102良优103中良104良良105良良106中中107差良108优中109中良110良中对上表进行交叉频数分析、总和分析和其他统计量的分析。Ⅱ.Case:MetropolitanResearch,Inc.MetropolitanResearch,Inc.,isaconsumerresearchorganizationthattakessurveysdesignedtoevaluateawidevarietyofproductsandservicesavailabletoconsumers.Inoneparticularstudy,MetropolitanwasinterestedinlearningaboutconsumersatisfactionwiththeperformanceautomobilesproducedbyamajorDetroitmanufacture.Aquestionnairesenttoownersofoneofthemanufacturers’full-sizedcarsrevealedseveralcomplaintsaboutearlytransmissionproblems.Tolearnmoreaboutthetransmissionfailures,MetropolitanusedasampleofactualtransmissionrepairsprovidedbyatransmissionrepairfirmintheDetroitarea.Thefollowingdatashowtheactualnumberofmilesthat50vehicleshadbeendrivenatthetimeoftransmissionfailure.85,09232,60959,46577,43732,53464,09032,464\n59,90239,32389,64194,219116,80392,85763,43665,60585,86164,34261,97867,99859,817101,76995,774121,35269,56874,27666,99840,00172,06925,06677,09869,92235,66274,42567,202118,44453,50079,29464,54486,813116,26937,83189,34173,34185,288138,11453,40285,58682,25677,53988,798ManagerialReport:1.Useappropriatedescriptivestatisticstosummarizethetransmissionfailuredata.2.Developa95%confidenceintervalforthemeannumberofmilesdrivenuntiltransmissionfailureforthepopulationofautomobilesthathavehadtransmissionfailure.Provideamanagerialinterpretationoftheintervalestimate.3.Howmanyrepairrecordsshouldbesamplediftheresearchfirmwantsthepopulationmeannumberofmilesdrivenuntiltransmissionfailuretobeestimatedwithamarginoferrorof5000miles.Use95%confedence.①STDEV②AVERAGE③CONFIDENCE(,STDEV,n)④LOWERLIMIT\n⑤UPPERLIMITⅢ.Givenarefiveobservationscollectedinaregressionstudyontwovariables.2457823264a.Developascatterdiagramforthesedata.b.Developtheestimatedregressionequationforthesedata.c.Usetheestimatedregressionequationtopredictthevalueofywhenx=4.