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

Question

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)$| t | < t _ { n - k - 1 }$ B)$| t | > t _ { n - k - 1 }$ C)$\left| t _ { i } \right| < t _ { n - k - 2 }$ D)$\left| t _ { i } \right| > t _ { n - k - 2 }$

Quizplus · Accepted Answer

An observation Xi is considered influential if its Studentized residual is greater in absolute value than the critical value of a t-test, indicating it has a significant impact on the regression model. Thus, $|t_i| > t_{n-k-2}$ is the correct criterion for identifying influential points.

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