For the following problems assume y = Χβ + ε and assume E(e) 0 and var(e)...

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For the following problems assume y = Χβ + ε and assume E(e) 0 and var(e) σ21. 3. Show that έ (1-X (XTX)-XT) ε. (Hint: Use the assumption that y + ε)

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