Seems exit poll was not scientific-just a PR job to justify more CIA games
<snip>According to Súmate, there are forty-five thousand of these volunteers all over the country-at least one at every single voting station, and at those voting stations deemed more important, there are as many as twenty.
Altamira, apparently, is one such location. Twenty conscripts stand around outside the voting center, clipboard in hand waiting for unsuspecting citizens to emerge, fresh from having voted. "Good afternoon," they purr, "would you mind telling us if you voted 'Yes' or 'No'?" and "Yes, yes, yes," is the most common response.
"How many 'No' votes have you received?" I asked, playing the naïve reporter.
"Let's see," she offered, tapping her tennis shoes, "there are no 'Nos' on this page, and one on this page. I have one 'No'."
"Just one?" I persisted.
"Well, I don't know about the others, but I have just one," she answered, then, spotting some emerging voters in the distance, she scampered of to collect more "Yeses." <snip>
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In that case, perhaps the best that they can hope for is to cast some doubt on the process; to exaggerate some irregularities, to create others. That way, they can refer in passing to problems with the referendum results for the rest of Chávez' tenure as President, never going into any detail, but perpetuating the international stereotype that Chávez has authoritarian tendencies. And releasing exit polls that directly contradict the official results may be the best way of accomplishing this.
http://www.venezuelanalysis.com/articles.php?artno=1248