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Regression Analysis: Earnings ($) versus DrDist, DrAccu, GIR, Sand Saves, Scrambling

Backward Elimination of Terms

Candidate terms: DrDist, DrAccu, GIR, Sand Saves, Scrambling

Constant

DrDist

DrAccu

GIR

Sand Saves

Scrambling

S

R-34

R-sq (adj)

R-sq (pred)

Mallows' Cp

------Step 1-----

Coef

-11280801

P

12222 0.448

-58196 0.026

107488

0.008

48630 0.009

66373

0.114

a to remove = 0.05

936403

21.648

18.35%

12.93%

6.00

-----Step 2 -----

Coef

-7264460

P

-71841

0.000

121557 0.001

46404 0.012

58872 0.149

934761

13.60%

4.58

-----Step 3-----

Coef

-4296110

939054

14.14%

4.69

a. Step 3 produces the final model. Which of the predictor(s) will not be in it? (Remember

to briefly explain your answer.)

b. Which of the models has the lowest multiple R-squared? The lowest adjusted R-

squared? (Remember to briefly explain your answer.)

c. If the alpha to remove is changed from 0.05 to 0.32, is it possible for DrDist to be in the

Step 2 model and one of the other predictors to be eliminated? Briefly explain your

answer.

Fig: 1