= Statistical dependence
= Dependent random variables
{synonym}
Two <random variables> are statistically dependent when their joint <probability distribution> differs from the product of their marginal <probability distributions>. Equivalently, some events determined by the two variables violate the product rule that defines <independence>. Nonzero <covariance> implies statistical dependence when the moments exist, but zero <covariance> does not in general imply <independence>.
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