22) 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,v2 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 22) A) Di < Fn-k-1,k 1 B) Di < Fk 1,n-k-1 C) Di > Fk 1,n-k-1 D) Di > Fn-k-1,k 1