Let X N3(0,) where 1 a) Showthatthespecificationabovedefinesaregularnormaldistributionon R3. b) Showthattheconcentrationmatrix K is givenas c) Letnow L

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Let X ∼ N3(0,Σρ) where −1

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a) Showthatthespecificationabovedefinesaregularnormaldistributionon R3.

b) Showthattheconcentrationmatrix Kρ is givenas

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c) Letnow L be thesubspacespannedbytheconstantvector e = (1, 1, 1)⊤. De-
termine theprojection ΠρX onto L with respecttotheinnerproduct ⟨·, ·⟩Kρ .

d) Determinethedistributionof ΠρX and X − ΠρX.

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