Posted by autumn on Monday, April 26, 2010 at 9:05pm.
I think I remember a bit of this from when we were generating OC curves for a math modeling project last semester.
In my notes there is the equation:
P(d)= (n!/(d!(n-d)!))*(p^d)(1-p)^(n-d)
It's assumed that the total lot is very large, so when you take n, the sample size, out doesn't change the remainder.
P(d)= prop of observing exactly d
number of defectives= d
random sample= n
p= fraction of defectives per lot.
Hope this helps
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