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Exam A00-240 topic 1 question 72 discussion

Actual exam question from SAS Institute's A00-240
Question #: 72
Topic #: 1
[All A00-240 Questions]

Refer to the exhibit:

SAS output from the RSQUARE selection method, within the REG procedure, is shown. The top two models in each subset are given.
Based on the exhibit, which statement is true?

  • A. The AIC champion model is more parsimonious than the SBC champion.
  • B. The SBC champion model is more parsimonious than the AIC champion.
  • C. The R-Square champion model is the most parsimonious.
  • D. Adjusted R-Square and R-Square agree on the champion model.
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Suggested Answer: B 🗳️
by jevanthony at Aug. 5, 2020, 7:49 p.m.

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Unorich
4 years, 1 month ago
Also, SBC champ has 6 models and AIC has 8.
upvoted 1 times
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jevanthony
4 years, 3 months ago
Why is it SBC instead of AIC?
upvoted 1 times
MrMister
4 years, 2 months ago
I believe because AIC is not concerned with the number of parameters, or predictor variables (parsimony) whereas SBC *is* concerned about parsimony. It's pretty common for a champion model to have both the lowest SBC value AND the lowest AIC value. But, regardless, SBC is concerned with having the least number of parameters, or predictor variables, as needed to explain a model.
upvoted 2 times
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