统计课程小结.ppt

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1、LETDATATELLYOUStatistics,Dataanalysis,AnddecisionG5groupForQTMPresentationG5IndustryCo.,Ltd.HEREISACOMPANYIt’sbusinessscopeisAllkindsofmetalstampings22.1%53.6%11.4%12.2%ThemainproductsNotebookCarcomponentsSmartphoneSeverTHEREISACONTRACTNOW:BUT,ITREQUIRETHEPRICETOREDUCEFOR15%.DOYOUS

2、IGNTHECONTRACT?THEN,YOUNEEDTHEDATATOCOMPILESTATISTICSTOANALYSETOMAKETHEDECISIONPartI:TOCOMPILESTATISTICSWecollecttheforty-twodays’datafromthefactoryInthissituation,itseemsthattheprojectwillbelossifyouacceptthecontract.SummarymeasuresforselectedvariablesDPPM:Thenumberofdefectsinmill

3、ionofproducts.Amount_DefectsDPPMCost_per_unitGrossprofitCount42.00042.00042.00042.00042.000Mean152423.0715177.35734902.448103.620-0.770Median146488.5005314.00036283.407103.765-0.915Standarddeviation32504.848683.0645786.5950.6210.621Minimum101125.0003734.00024627.068102.525-1.935Max

4、imum213720.0006356.00045661.392104.7850.325Fromthedata,wecangetthefollowinginformationSo,weshouldusetheseinformationtofurtheranalyzetheissue.PartII:DATAANALYSISAccordingtothedata,thediagramcanbedrawFromthediagramwecanfindthegrossprofitratioisinverserelativewiththedefectsratio.Then,

5、WewillthroughtheregressionanalysistofindthelinearequationFromtheF-testandT-test,wegetthep-value

6、linearequation.Profit=1.9951-0.0001*DPPMSo,DPPMshoulddownto19951andbelow.TheDPPMisnormaldistribution.Thebiggestvalueoffrequencyappearnearthemean.NOW,WEWILLANALYSETHEDATAOFDPPMHypothesisTestingTheDPPMdataasindependentsampleswereanalyzedbyTtest.Assumption:H0<=19951Ha>19951For19951ist

7、hebreak-evenpointP

8、tively,andobtaintherelevan