Nisa, on 2012-05-21 19:23:57, said:
brit1984, on 2012-05-21 18:22:19, said:
I wasn't aware they had a system for tracking all the spending of tourists in Thailand. No checkout girl/guy has ever asked me whether I am resident or visitor.
Maybe all shops have some advanced system of hidden cameras with facial recognition technology linked to the cameras that take your photo at immigration; or maybe they have a huge team of detectives following all tourists and itemising their purchases.
Amazing Thailand.
Sent from iPhone; please forgive any typos or violations of forum rules
Maybe all shops have some advanced system of hidden cameras with facial recognition technology linked to the cameras that take your photo at immigration; or maybe they have a huge team of detectives following all tourists and itemising their purchases.
Amazing Thailand.
Sent from iPhone; please forgive any typos or violations of forum rules
It is done by polling / surveys and not at the grocery store. Same as with political polls, Unemployment Figures, Neilson Ratings and so on. You only need a small percentage of total people to get fairly accurate results but they of course are not going to be perfect and why you typically see a footnote saying there is a 3 or 4% margin of error.
I always was of the belief "the smaller the sample the less reliable the result unless the questions are BIASED towards the desired outcome" when in doubt select "C".




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