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Chebyshev's inequality

Definition from Dictionary, a free dictionary
The ideas of a time are like the clothes of a season: they are as arbitrary, as much imposed by some superior will which is seldom explicit. They are utilitarian and political, the instruments of smooth-running government.
Wyndham Lewis
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English

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Etymology

From surname of Pafnuty Chebyshev, the discoverer.

Noun

Chebyshev's inequality

  1. (Template loop detected: Template:context 1) The theorem that in any data sample with finite variance, the probability of any random variable X lying within an arbitrary real k number of standard deviations of the mean is 1 / k2, i.e. assuming mean μ and standard deviation σ, the probability Pr is:
    <math>\Pr(\left|X-\mu\right|\geq k\sigma)\leq\frac{1}{k^2}</math>

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