IIBA CBDA Exam - Topic 1 Question 5 Discussion

Actual exam question for IIBA's CBDA exam

Question #: 5
Topic #: 1

An analyst is performing regression analysis and reviewing the results. They would like to rescale the variables in the model to more clearly reflect the relationship between the regression coefficients. Which technique could be used to rescale the variables?

ADimension Reduction

BMean Centering

CNormalization

DClustering
Explanation:
Normalization is a technique that rescales the values of the variables in a data set to a common range, such as [0,1] or [-1,1]. Normalization can help reduce the effect of outliers, improve the performance of some algorithms, and make the interpretation of the regression coefficients easier and more consistent. Normalization can be done using different methods, such as min-max scaling, z-score scaling, or unit vector scaling.

Show Suggested Answer

Suggested Answer: C

by Detra at Mar 08, 2024, 12:50 AM

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Werner

7 months ago

Wait, can normalization really reduce the effect of outliers? That sounds surprising!

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Sharika

7 months ago

I agree, normalization makes the coefficients clearer.

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William

7 months ago

Clustering won't help with rescaling, right?

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Elly

7 months ago

I thought mean centering was enough for that?

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Chauncey

8 months ago

Normalization is definitely the way to go for rescaling!

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Johnna

8 months ago

I feel like mean centering is more about centering the data around the mean, while normalization actually rescales it.

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Clay

8 months ago

Clustering seems off-topic for this question, but I can't recall if dimension reduction might have some relevance.

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Alpha

8 months ago

I remember practicing a question about scaling variables, and normalization was definitely mentioned as a key method.

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Claudio

8 months ago

I think normalization is the right technique here, but I'm not completely sure if mean centering could also apply in some cases.

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Ernest

8 months ago

Wait, I'm a little confused. Wouldn't dimension reduction also be an option to rescale the variables? I'll need to review the differences between these techniques to make sure I select the right one.

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Loren

8 months ago

Okay, I've got this. Normalization is definitely the way to go here. It will help ensure the variables are on a common scale, which should make the regression results easier to interpret. I feel confident about this one.

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Gwenn

8 months ago

Hmm, I'm a bit unsure about this one. Is normalization the only option, or could mean centering also work to rescale the variables? I'll have to think through the pros and cons of each technique.

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Serita

9 months ago

This seems like a straightforward question. I think normalization would be the best approach to rescale the variables and make the regression coefficients more interpretable.

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Xuan

9 months ago

I'm a bit confused by the wording of the question. Is it asking about the specific features of Vlocity CPQ, or just general CPQ capabilities? I'll have to think this through carefully before selecting an answer.

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Ranee

9 months ago

Hmm, this seems like a tricky one. I'll need to think carefully about the capabilities of Fusioninsight Manager.

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Hershel

9 months ago

I'm feeling confident about this one. The XML document is straightforward, and the XSLT style sheet should be able to handle it without too much trouble.

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Kiley

9 months ago

Based on my understanding, the eStreamer is used to get data from the Firepower Management Center, not just send it. I'll focus on the options that mention getting or retrieving data.

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