Partial Regression Plots Are Useful for Which of the Following

Multiple Choice

Partial regression plots are useful for which of the following reasons?

A) They have a slope equal to the coefficient value.
B) They can help you judge whether a re-expression of a predictor is needed.
C) They can help you identify outliers and influential points.
D) They have a direction that corresponds to the sign of its multiple regression coefficient.
E) All of the above.