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Unformatted text preview: -+ where r=number of successes Ex) p(accept)=.2 , r=need 5, the P(15 need to be asked) = nb(10,5,0.2)-Hypergeometric h(x;n,M,N)= N n M N x n M x C C C , , ,--N=population, M=successes in pop, n=sample selected Ex) section 1=20, section 2= 30, 15 are graded, P(10 from section 2)= h(10;15,30,50) -Poisson ! ) ( ) ; ( x e x p x -= where =rate/time. Can estimate =E(X)=V(X) Ex) when you are doing at most x do a summation of all numbers up to x Ex) mean 3hits/min, P(10hits in 5 min)?, get 3h/m= 15h/5m, p(10, 15)-Poisson Process ! ) ( ) ( x t e t P x t x -= where =t Pmf E(X) V(X) Binomial np np(1-p) Negative Binomial p p r ) 1 (-2 ) 1 ( p p r-Hypergeometric N nM ) 1 ( ) )( ( 2---N N n N M N nM Poisson...
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- Spring '08