Fisher Information With Respect to Cumulants

Details Fisher Information With Respect to Cumulants Fisher Information With Respect to Cumulants

2002-12-08

arxiv.org/abs/physics/0212035v2

IEEE Trans. Inf. Theory 50, 638-642 (2004)

Physics

Data Analysis, Statistics and Probability

REVTeX v4, 8 pages; content revised, condensed; previous version: REVTeX v4, 15 pages

Scientific paper

10.1109/TIT.2004.825034

Fisher information is a measure of the best precision with which a parameter can be estimated from statistical data. It can also be defined for a continuous random variable without reference to any parameters, in which case it has a physically compelling interpretation of representing the highest precision with which the first cumulant of the random variable, i.e., its mean, can be estimated from its statistical realizations. We construct a complete hierarchy of information measures that determine the best precision with which all of the cumulants of a random variable -- and thus its complete probability distribution -- can be estimated from its statistical realizations. Several properties of these information measures and their generating functions are discussed.

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