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Line 24: :: <math> \operatorname{Cov} (X_i,X_j) = \text{constant} \ge \frac{-1}{n-1}.</math> : "Constant" in this case means not depending on the values of the indices ''i'' and ''j'' as long as ''i'' ≠ ''j''. * For an infinite exchangeable sequence,

Exchangeable random variables: Difference between revisions