泊松分布The number of defective components produced by a certain
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泊松分布
The number of defective components produced by a certain process follows
a Poisson distribution with mean k.Each defective component has probability p0 as being
repairable.
a.Find the probability that exactly N defective components are found.
b.Suppose we have exactly N defective components,let Y be the number of repairable
components,ˉnd the probability distribution of Y .
c.Find the moment generating function of the distribution you obtained in part b.
d.What is the probability that we ˉnd exactly N defective components,and among them,
n are repairable?
The number of defective components produced by a certain process follows
a Poisson distribution with mean k.Each defective component has probability p0 as being
repairable.
a.Find the probability that exactly N defective components are found.
b.Suppose we have exactly N defective components,let Y be the number of repairable
components,ˉnd the probability distribution of Y .
c.Find the moment generating function of the distribution you obtained in part b.
d.What is the probability that we ˉnd exactly N defective components,and among them,
n are repairable?
a: exp(-k)*N^k/N! (感叹号表示阶乘)
b:Y服从B(N,p0) (二项分布)
c:矩母函数:(1-p0+p0*exp(t))^N
d:这是个复合泊松过程,每一项是两点分布,
可以修复的元件的个数的剧目函数是exp{K(1-p0+p0*exp(t))^N)-1}
期望是K*P0, 方差是K*PO*(1-P0)+K*P0^2
b:Y服从B(N,p0) (二项分布)
c:矩母函数:(1-p0+p0*exp(t))^N
d:这是个复合泊松过程,每一项是两点分布,
可以修复的元件的个数的剧目函数是exp{K(1-p0+p0*exp(t))^N)-1}
期望是K*P0, 方差是K*PO*(1-P0)+K*P0^2
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