Restricting that the subject of this statement be unimodal yields a similar one named for Vysochanski and Petunin, which introduces an additional 4/9 factor. This statement can be proven by defining Y to be x minus mu quantity squared and a to be sigma-k quantity squared and then applying (*) Markov's inequality. When this statement is applied to a sample mean, it can be used to prove the law of large numbers. For 10 points, name this statement which, in one phrasing states that posits that all 
Restricting that the subject of this statement be unimodal yields a similar one named for Vysochanski and Petunin, which introduces an additional 4/9 factor. This statement can be proven by defining Y to be x minus mu quantity squared and a to be sigma-k quantity squared and then applying (*) Markov's inequality. When this statement is applied to a sample mean, it can be used to prove the law of large numbers. For 10 points, name this statement which, in one phrasing states that posits that all values in a probability distribution are a limited distance from its mean.
Restricting that the subject of this statement be unimodal yields a similar one named for Vysochanski and Petunin, which introduces an additional 4/9 factor.
{Chebyshev’s} inequality [or equation or theorem]