On 01/14/2011 03:33 PM, Stephen Russell wrote:
> On Fri, Jan 14, 2011 at 3:15 PM, Michael Madigan<[email protected]>  wrote:
>> A 2% deviation from the mean is significant?  IN WHAT WORLD?
> --------------------
>
> I don't remember SD comparisons as a %.
>
> What I do remember is you generate the average and then identify the
> points +&  - from center for your curve by your population values.
> Wow was that a long time ago that I did that.
>
>
>

I believe one standard deviation from the norm would encompass 
approximately 67% of the universe being sampled.  A 2% change between 
two statistical means is talking about something completely different.

http://en.wikipedia.org/wiki/Standard_deviation

Regards,

LelanedJ


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