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Hey, Julie, it seems like you should be able to use statistical  
modeling to solve this problem, as long as you don't need an exact  
count.   Gallup interviews a thousand people and then predicts who's  
going to win the next election.  You could do the same—interview a  
couple hundred representative visitors and then apply the ratio to  
total attendance.  You might have to do it anew each time you bring  
in a new exhibit since attendance ratios would likely change, but  
that would be true no matter what technique you use.

Chuck Howarth, Vice President
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On Jul 6, 2009, at 1:44 PM, Julie McNalley wrote:

>
> I have a question about getting accurate counts of visitors to non- 
> upcharge traveling or special exhibits.
>
>


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