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cov (X,Y) != 0 does not imply X independent of Y Example. X ~ N(0,1) Y = X 2

cov (X,Y) != 0 does not imply X independent of Y Example. X ~ N(0,1) Y = X 2 Cov (X,Y) = E(XY) – E(X) E(Y0 There is a time series variant.

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cov (X,Y) != 0 does not imply X independent of Y Example. X ~ N(0,1) Y = X 2

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  1. cov(X,Y) != 0 does not imply X independent of Y Example. X ~ N(0,1) Y = X2 Cov(X,Y) = E(XY) – E(X) E(Y0 There is a time series variant

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