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Questions that seek a conceptual or non-mathematical understanding of statistics.

23 votes
3 answers
19k views

Meaning of completeness of a statistic? [duplicate]

From Wikipedia: The statistic $s$ is said to be complete for the distribution of $X$ if for every measurable function $g$ (which must be independent of parameter $θ$) the following implication hol …
Tim's user avatar
  • 19.8k
347 votes
13 answers
203k views

How to understand degrees of freedom?

From Wikipedia, there are three interpretations of the degrees of freedom of a statistic: In statistics, the number of degrees of freedom is the number of values in the final calculation of a st …
Tim's user avatar
  • 19.8k