Markov's Inequality - Corollary: Chebyshev's Inequality

Corollary: Chebyshev's Inequality

Chebyshev's inequality uses the variance to bound the probability that a random variable deviates far from the mean. Specifically:

for any a>0. Here Var(X) is the variance of X, defined as:

Chebyshev's inequality follows from Markov's inequality by considering the random variable

for which Markov's inequality reads

Read more about this topic:  Markov's Inequality

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    Nature is unfair? So much the better, inequality is the only bearable thing, the monotony of equality can only lead us to boredom.
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