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NOVA scienceNOW | Wisdom of the Crowds | PBS

http://www.pbs.org/nova/sci... Ask enough people to estimate something, and the average of all their guesses will get you surprisingly close to the right answer. Don't miss the new season of NOVA s...  
 
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tyrone199 (2 months ago) Show Hide
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It all depends on how well the guessers guess.
cjellwood (2 months ago) Show Hide
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nice video! now where do i find 1000 people to work on tonights lotto?
BBoyWhizz (2 months ago) Show Hide
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awesome...just watched derren brown...either way its an excellent theory..
lonogugeadult (5 months ago) Show Hide
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wait how is it the median not mean
rlseii (4 months ago) Show Hide
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The mean of a normal distribution is also the median.

Imagine a bell curve, the mean is in the middle right? , and also the median is the middle value in a set of numbers.
RogerOnTheRight (2 months ago) Show Hide
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The median is the midpoint of data, so half the points are below this value, half are above.

The mean is the average.

In a "normal" distribution, the two will coincide. In a skewed distribution, they will differ.
Eldxale (5 months ago) Show Hide
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In democracy, they use the mode, not the average. Besides, the choices given are not the right one, like if I asked, "What's two plus two, fish or squirrel?"
RogerOnTheRight (2 months ago) Show Hide
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Still, in free markets, group behaviour is amazingly powerful. Markets are intelligent.
lax4ever1 (8 months ago) Show Hide
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ha. that was pretty awesome to watch
23GrandMasterK (8 months ago) Show Hide
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anomaly.

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