Question: Reanalyze the PublicSchools data using robust methods: (a) Run a regression of Expenditure on Income using least trimmed squares (LTS). Which observations correspond to large

Reanalyze the PublicSchools data using robust methods:

(a) Run a regression of Expenditure on Income using least trimmed squares (LTS). Which observations correspond to large LTS residuals?

(b) Which observations are high-leverage points?

(c) Run OLS on the data, excluding all observations that have large LTS residuals and are high-leverage points. Compare your result with the analysis provided in Section 4.1.

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