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SAS A00-240 Exam - Topic 9 Question 22 Discussion

One common approach for predicting rare events in the LOGISTIC procedure is to build a model that disproportionately over-re presents those cases with an event occurring (e.g. a 50-50 event/non-event split).What problem does this present?
B) Only the intercept estimate is biased.
A) All parameter estimates are biased.
C) Only the non-intercept parameter estimates are biased.
D) Sensitivity estimates are biased.

SAS A00-240 Exam - Topic 9 Question 22 Discussion

Actual exam question for SAS's A00-240 exam
Question #: 22
Topic #: 9
[All A00-240 Questions]

One common approach for predicting rare events in the LOGISTIC procedure is to build a model that disproportionately over-re presents those cases with an event occurring (e.g. a 50-50 event/non-event split).

What problem does this present?

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Suggested Answer: B

by Gail at May 09, 2022, 11:59 PM

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Micaela
7 months ago
Not sure about this, can we really trust those estimates?
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Dan
7 months ago
D makes sense too, sensitivity can get messed up.
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Nakisha
8 months ago
Wait, only the intercept? That seems off.
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Ira
8 months ago
Totally agree, bias is a big issue here!
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Ettie
8 months ago
A is the right answer, all estimates get skewed.
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Filiberto
8 months ago
I’m leaning towards the idea that sensitivity estimates could be biased too, especially if the model is skewed.
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Octavio
8 months ago
I feel like I read somewhere that only the non-intercept estimates could be biased, but I can't recall the details.
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An
8 months ago
I think we practiced a similar question where we talked about how the intercept might be affected more than other estimates.
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Latosha
8 months ago
I remember discussing how oversampling can lead to biased parameter estimates, but I'm not sure if it's all parameters or just some.
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Alison
8 months ago
Hmm, this one seems tricky. I'll need to carefully review the options and think through the possible configurations for clientless SSLVPN.
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Nickole
9 months ago
Hmm, this one seems tricky. I'll have to think it through carefully.
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Marisha
9 months ago
Okay, I think I've got this. Based on the requirements, I'd say we need to apply the Data Format Transformation, Data Model Transformation, and Event-Driven Messaging patterns in addition to the Orchestration compound pattern. The other options don't seem as directly relevant.
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