Question: (Show that, in simple-regression analysis, the hat-value is hi 1 n Xi $ X 2 Pn j1 Xj $ X 2 [Hint: Evaluate

(Show that, in simple-regression analysis, the hat-value is hi ¼ 1 n

þ ðXi $ XÞ

2 Pn j¼1 ðXj $ XÞ

2

[Hint: Evaluate x0 i

ðX0 XÞ

$1 xi for x0 i ¼ ð1; XiÞ.]

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