Visit the forum if you have a language query!

# Chebyshev's inequality

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

## English

Wikipedia has an article on:
Wikipedia

### 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:
$\Pr(\left|X-\mu\right|\geq k\sigma)\leq\frac{1}{k^2}$

## Elsewhere on the web

### En-De

OnelookIATEIATEIATEIATEProZDict.cc
WordnikIATELinguee