Tchebycheff inequality

noun
Tche·by·cheff inequality | \chəbəˈshȯf-\

Definition of Tchebycheff inequality 

: an inequality that gives an upper limit to the probability that a variable will assume a value more than a specified number of standard deviations away from its mean

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History and Etymology for Tchebycheff inequality

after Pafnuty L. Tchebycheff †1894 Russian mathematician

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