Le 28/04/2011 16:33, gregjohn nous fit lire :
> I have a situation (at work, if it matters) where I am seeing a population of
> points or defects which are not spread out as random pixelated points but rather
> as a cloud or noise3d-like function. I am wondering if we could learn more about
> the cause or improve our sampling plan by thinking about it with the right
> statistical ideal.
> 
> Can anyone point me to the proper terminology for this, or primers on ways to
> statistically model this, or even what one can say about the physical mechanisms
> when it happens this way?

chi-square tests.

http://en.wikipedia.org/wiki/Chi-square_distribution

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