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1 Ch2 Modeling Process Quality 1.Describing variationDescribing variation 2.Discrete DistributionDiscrete Distribution 3.Continuous DistributionContinuous.

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Presentation on theme: "1 Ch2 Modeling Process Quality 1.Describing variationDescribing variation 2.Discrete DistributionDiscrete Distribution 3.Continuous DistributionContinuous."— Presentation transcript:

1 1 Ch2 Modeling Process Quality 1.Describing variationDescribing variation 2.Discrete DistributionDiscrete Distribution 3.Continuous DistributionContinuous Distribution 4.Some useful approximationSome useful approximation

2 2 Describing variation 回上頁 The Box Plot Numerical Summary of Data : e.g. sample mean and sample variance Frequency Distribution and Histogram Stem and Leaf Plot

3 3 Discrete Distribution 回上頁 Pascal ( negative binomial ) 當 r=1 時,稱為「 geometric distribution 」 Poisson Binomial Hypergeometric

4 4 Continuous Distribution 回上頁 Weibull Gamma Exponential Normal

5 5 Some useful approximation 回上頁 Binomial NormalPoisson Hypergeometric If n/N is small ( e.g. ), then Binomial with p=D/N is a good approximation to the Hypergeometric. 若 則可以 Poisson 來估計 Binomial. np>10,, 當 n 大時, 令 利用 C.L.T. 可以 Normal 來估計 Binomial.


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