Re: Faulty Sample

From: Anon. (bob.ohara_at_NOSPAM.helsinki.fi)
Date: 12/29/04 

Date: Wed, 29 Dec 2004 09:36:25 +0200

Soumyadip Rak*** wrote:
> Hello,
>
> I am working in the production line of a bulb manufacturing company. A
> random check on 1000 bulbs from the entire week's production yielded only 1
> failure.
>
> I need to know the 90% Confidence Interval around the 1 failure. Could you
> please advice on how I may go about it. What distribution does this fall
> under ?
>
I never realised Bath University had a light bulb manufacturing company.

This looks very like a homework problem, and the "rule" around here is
that we won't do people's homework for them unless they can show that
they have made a decent attempt at the problem (in which case a prod in
the right direction may be enough).

The problem is to convert the information into something more
mathematical, and then searching through your lecture notes to find the
relevant equations.

Bob 

-- 
Bob O'Hara
Department of Mathematics and Statistics
P.O. Box 68 (Gustaf Hällströmin katu 2b)
FIN-00014 University of Helsinki
Finland
Telephone: +358-9-191 51479
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Journal of Negative Results - EEB: www.jnr-eeb.org