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

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.