Using the Hat Matrix Elements Hi to Determine Influential Points

question 59

Multiple Choice

Using the hat matrix elements hi to determine influential points in a multiple regression model with k independent variable and n observations, X_i is an influential point if

• A) h_i < n(k +1)/2.
• B) h_i > n(k +1)/2.
• C) h_i < 2(k +1)/n.
• D) h_i > 2(k +1)/n.

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