SAS A00-240 Exam - Topic 9 Question 22 Discussion

Actual exam question for SAS's A00-240 exam

Question #: 22
Topic #: 9

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?

AAll parameter estimates are biased.

BOnly the intercept estimate is biased.

COnly the non-intercept parameter estimates are biased.

DSensitivity estimates are biased.

Show Suggested Answer

Suggested Answer: B

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

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Micaela

4 months ago

Not sure about this, can we really trust those estimates?

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Dan

4 months ago

D makes sense too, sensitivity can get messed up.

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Nakisha

4 months ago

Wait, only the intercept? That seems off.

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Ira

4 months ago

Totally agree, bias is a big issue here!

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Ettie

5 months ago

A is the right answer, all estimates get skewed.

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Filiberto

5 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

5 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

5 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

5 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

5 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

5 months ago

Hmm, this one seems tricky. I'll have to think it through carefully.

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Marisha

5 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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