Euh wrote:
>
> Hello all,
>
> I'm trying to evaluate the concentration of suspended particles �n a
> flask.
> I took 3 differents samples from the flask and, for each sample, I did
> 20 counts under the microscope (= at 20 different locations on the
> microscope slide)
I note that these data do *not* follow the Poisson distribution that
one would expect if the particles were uniformly distributed and the
samples were of the same volume (standard deviations are 2 to 4 times
what they would be for a Poisson(N) distribution with N ~ 100.)
This suggests that your particles cluster in some way. Without some
understanding of the clustering process you are unlikely to be able to
get any meaningful result.
-Robert Dawson
.
.
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