Special Probability Distributons

7 important questions on Special Probability Distributons

X successes in n trials

Binomial

Kth success on xth trial

negative binomial

1st succes of xth trial

geometric distribution (also negative binomial, k=1)
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Chance of x out of M faulty products will be chosen when N elements and n chosen total

Hypergeometric

How to approximate hypergemotric series?

binomial with o=M/N

When will poisson distribution be good and excellent?

Good: n>=20, Ø<=0.05
Excellent: n>=100 nØ<=10

When binomial as approx?

n/N <= 5%

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