The plot below shows the Residuals vs Fitted Values for the model of predictors Height, Weight, and Chest measurements (all in inches) and response percent body fat (Pct.BF)
Before observation 251 was removed.It was assumed that a typo was made and an extra zero
Was added to the Pct.BF value.Which of the following statements are true?
A) After removing observation 251 , The value of $R ^ { 2 }$ will increase.
B) After removing observation 251 , he standard deviations of the residuals will decrease.
C) Observation 251 is clearly a high leverage point.
D) The coefficient of Chest will not change when this point is removed.
E) Making conclusions without plotting the data can be disastrous.

Question

The plot below shows the Residuals vs Fitted Values for the model of predictors Height, Weight, and Chest measurements (all in inches) and response percent body fat (Pct.BF)
Before observation 251 was removed.It was assumed that a typo was made and an extra zero
Was added to the Pct.BF value.Which of the following statements are true? 
A) After removing observation 251 , The value of $R ^ { 2 }$ will increase. 
B) After removing observation 251 , he standard deviations of the residuals will decrease. 
C) Observation 251 is clearly a high leverage point. 
D) The coefficient of Chest will not change when this point is removed. 
E) Making conclusions without plotting the data can be disastrous.

Quizplus · Accepted Answer

The Answer is A,B,C,E

The Plot Below Shows the Residuals Vs Fitted Values for the Model