At first it was but a lurid spark upon the stone pavement. Then it lengthened out until it became a yellow line, and then without any warning or sound, a gash seemed to open and a hand appeared,... “The Red-Headed League” The basic tool used for investigating dependencies between the ith and jth components of a random vector X is the covariance
KeywordsNull Hypothesis High Dimension Marketing Strategy Variance Decomposition Empirical Covariance
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