| Date: | Wed, 4 Jan 2006 21:01:05 +0100 |
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| Reply-To: | Miguel de la Hoz <miguel_hoz@YAHOO.ES> |
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| Sender: | "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU> |
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| From: | Miguel de la Hoz <miguel_hoz@YAHOO.ES> |
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| Subject: | Sample Theory |
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| Content-Type: | text/plain; charset=iso-8859-1 |
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Hi all,
First of all, all my best for the new year...
After some relaxing days on holidays, I am back. I have a question about sample theory, and I need your help.
It is a problem about inference and sample theory. I have a sample of 1000 cases. 800 of them has a car, the rest 200 doesn't. With the 800 people the error is 3.3 and with 200 it is 6.3.
I have different car contructors (Ford, Toyota, Honda,...) and the messure of the awareness of the clients in 3 different Cities (NY, Houston and LA) .
So, I have that in NY the awareness of Ford trade is 97%. But my question is about how to infere how represent this 97% for the entire population of NY. I only have the total error separated by owners and non-owners. I don't figure how can I reach a solution.
Any help will be welcomed.
Many thanks in advance.
Miguel.
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