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A sufficient statistic is a lower dimensional function of the data which contains all relevant information about a certain parameter in itself.

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In trying to prove a statistic is NOT complete, can the counter-example function be a functi...

I believe the source of confusion here is the fact that, in statistics, the composition of functions is denoted with parentheses, i.e., $g(f)$ rather than $g \circ f$. Recall that we define $g \circ f …
Hilario Fernandes's user avatar