aspenmcneal5441 aspenmcneal5441

20-03-2024
Engineering

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Derive expressions for the means and variances of the following linear combinations in terms of the means and covariances of the random variables X₁, X₂ , and X₃.
(a) X₁ - 2X₂
(b) -X₁ + 3X₂
(C) X₁ + X₂+x₃
(d) x₁+2x₂-x₃

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