Which of the followings is correct in diagnosing a multiple

Which of the followings is correct in diagnosing a multiple linear regression? Choose all correct answers.

a. Difference in Fits (DFITS) is a measure of the change in the predicted value when observation i is omitted.

c. COOK\'S Distance summarizes how much all of the fitted values change when the ith observation is deleted.

d. If the COOK\'S Distance is greater than 1, then the ith data point is worthy of further investigation.

e. DFBETAS is a measure of the influence of the ith case on each regression coefficient by the difference between the estimated regression coefficient based on all n cases and the regression coefficient obtained when the ith case is omitted.

Solution

a,c,d are correct in diagnosing a multiple linear regression.