CentralLimitTheorem-中心极限定理.ppt

CentralLimitTheorem中心极限定理,SixSigmaGreenbeltTraining,4.2-1,工序改善方法论TM,Define,Measure,Analyze,Improve,Control,Step7-Data收集,Step8-Data分析,Step9-VitalFewX的选定,Sampling(单纯,层化,群体,系统),MultiVariCentrallimitHypothesistestingConfidenceintervalANOVA,T-testChi-squareCorrelation,regression,CSUBCnormal709.MTBrmeanc1-c9c10MTBdescribec1-c10我们期望列C10的标准偏差怎么样？它是什么?,4.2-12,用MINITAB找出标本,4.2-13,标准平均数据制作,4.2-14,标准平均数据制作,4.2-15,MINITABDescriptiveStatistics,4.2-16,VariableNMeanMedianTrMeanStDevSEMeanC125070.06970.65170.1728.8760.561C225070.25370.14970.3228.6140.545C325070.17070.28670.1558.2720.523C425070.52570.19670.5248.8140.557C525069.12368.49269.2158.6370.546C625071.38072.15971.5158.6700.548C725069.40969.52369.3478.8170.558C825069.69869.75369.6488.7660.554C925069.47269.43969.6258.3620.529C1025070.01170.14370.0422.8870.183,结果_统计良比较,4.2-17,结果_统计量比较,VariableNMeanMedianTrMeanStDevSEMeanC125070.06970.65170.1728.8760.561C225070.25370.14970.3228.6140.545C325070.17070.28670.1558.2720.523C425070.52570.19670.5248.8140.557C525069.12368.49269.2158.6370.546C625071.38072.15971.5158.6700.548C725069.40969.52369.3478.8170.558C825069.69869.75369.6488.7660.554C925069.47269.43969.6258.3620.529C1025070.01170.14370.0422.8870.183,什么意识?,现在开始比较。,4.2-18,结果_柱装图比较,标本的散步(C9)和标准平均的散步(C10)进行比较。,散布减少了很多.,=8.36,=2.89,4.2-19,结果_点装图比较,用点装图比较频度数能够更明确的了解。,4.2-20,结果,让我们实实在在地推动我们的系统!,中心极限定理,样本平均值分布的平均值和总体的平均值十分接近。样本平均值分布的标准偏差等于总体的标准偏差除以样本数的平方根。样本平均值的分布十分接近正态分布。,4.2-22,是标准平均的分布.,个别测定值分布.,追加调查,4.2-21,