Using the Cook's Distance Statistic Di to Determine Influential Points

question 77

Multiple Choice

Using the Cook's distance statistic Di to determine influential points in a multiple regression model with k independent variable and n observations and letting Fv1,v 2 denote the critical value of an F distribution with v1 and v2 degrees of freedom at a 0.50 level of significance, Xi is an influential point if

• A) D i > F k+1,n-k-1
• B) D i < F n-k-1,k+1
• C) D i < F k+1,n-k-1
• D)D i >F n-k-1,k+1