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Re: st: RE: No. of observations


From   Phil Clayton <philclayton@internode.on.net>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: RE: No. of observations
Date   Tue, 22 May 2012 16:25:02 +1000

You're not giving us much to go on. How did you select the subsamples?

Usually this kind of problem means that you need to get to know your data better. For example, your subsamples might be based on sex ("M" or "F"), but you might also have a sex of "U" (unknown), or missing, or "Male" that makes up the remaining 50 cases.

Phil

On 22/05/2012, at 4:09 PM, Hamizah Hassan wrote:

> What I mean is that, say I have no. of observation of full sample is 1000. This full sample is divided into 2 sub-samples where the total no. of observation of these 2 sub-samples is less than 1000, say 950. Is there any technical explanation on this?
> 
> Hamizah
> 
>>>> Kieran McCaul <kieran.mccaul@uwa.edu.au> 22/05/12 12:35 PM >>>
> ...
> 
> A sub-sample of a sample will, by definition, be smaller than the sample, won't it?
> 
> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu [mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Hamizah Hassan
> Sent: Tuesday, 22 May 2012 9:29 AM
> To: statalist@hsphsun2.harvard.edu
> Subject: st: No. of observations
> 
> Greetings,
> 
> I have an issue that has been questioned where the no. of observations of my full sample and sub-sample (of a variable) are not the same, i.e. the total observations of my sub-sample is lesser than the full sample. How could I explain this?
> 
> Thank you.
> 
> Regards,
> Hamizah Hassan
> RMIT University
> Melbourne 
> 
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