Using the Hat Matrix Elements Hᵢ to Determine Influential Points

question 103

Multiple Choice

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

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

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Definitions:

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