Yep, its not a graded thing, unfortunately a real world sampling issue.
Compositepro,
The more i've been thinking about it the closer I think you are. I was going down a similar path just from the other side of things but your solution seems correct.
Anyone else have any thoughts before we...
So I have a box with 2000 lets call them marbles. I need to determine how many marbles I need to sample to make sure i get at least one from each of 4 500 marble subsets. How would the number change if i only needed a 95% confidence interval for getting one from each subset.
Thoughts?