The clustering illusion is the tendency to erroneously consider the inevitable “streaks” or “clusters” arising in small samples from random distributions to be non-random. The illusion is caused by a human tendency to underpredict the amount of variability likely to appear in a small sample of random or semi-random data.
The above text is retrieved from the Wikipedia article “Clustering Illusion“,which has been released under theGNU Free Documentation License. Text available under the Creative Commons Attribution-ShareAlike License; additional terms may apply.
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