Re: An interesting (I hope) problem

2000-06-16 Thread Vincent Vinh-Hung
Can it be considered as a variant of urn sampling? say, instead of colored balls, we'd look at balls of various sizes. Physically identical - analogy: random sampling Vary in chemical composition - analog: variation in size - the sizes of the balls have some distribution sampling estimate the

An interesting (I hope) problem

2000-06-12 Thread Alan McLean
Hi to all. A friend of mine has a problem. The following is my understanding of the problem. She has a box of, say, 50 physically identical (to the eye, anyway) objects, but they vary in chemical composition - there may be half a dozen or so different compositions in the box. She has another of

Re: An interesting (I hope) problem

2000-06-12 Thread Herman Rubin
In article [EMAIL PROTECTED], Alan McLean [EMAIL PROTECTED] wrote: Hi to all. A friend of mine has a problem. The following is my understanding of the problem. She has a box of, say, 50 physically identical (to the eye, anyway) objects, but they vary in chemical composition - there may be half

Re: An interesting (I hope) problem

2000-06-12 Thread Donald Burrill
If I understand correctly, the question asks the required sample size out of the 50 (or so) objects in the box. Unless some probability is, at least implicitly, specified, I do not see that this is a statistical question. To be certain whether the "outside" object has a composition that