Using the Studentized Residuals Tᵢ to Determine Influential Points in a Multiple

question 19

Multiple Choice

Using the Studentized residuals tᵢ to determine influential points in a multiple regression model with k independent variable and n observations and letting tn₋k₋₂ denote the upper critical value of a two-tail t test with a 0.10 level of significance, Xᵢ is an influential point if

• A) |tᵢ| < tn₋k₋₁.
• B) |tᵢ| > tn₋k₋₁.
• C) |tᵢ| < tn₋k₋₂.
• D) |tᵢ| > tn₋k₋₂.

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