Discuss SAS A00-240 Exam Topic 3 Question 58

What is a drawback to performing data cleansing (imputation, transformations, etc.) on raw data prior to partitioning the data for honest assessment as opposed to performing the data cleansing after partitioning the data?

AIt violates assumptions of the model.

BIt requires extra computational effort and time.

CIt omits the training (and test) data sets from the benefits of the cleansing methods.

DThere is no ability to compare the effectiveness of different cleansing methods.

Suggested Answer: D

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11 comments · newest first

Terrilyn 12 months ago

Yeah, but it also takes more time to do it after, right?

Louvenia 12 months ago

It omits the training and test data sets from the benefits of cleansing methods.

Nan 1 year ago

Wait, I thought cleansing was always a good thing?

Zack 1 year ago

Totally agree, cleansing before partitioning can skew results.

Junita 1 year ago

It violates assumptions of the model.

Glory 1 year ago

I wonder if not being able to compare the effectiveness of different cleansing methods is a significant drawback, but I can't recall if that was emphasized in our studies.

Frederica 1 year ago

I feel like the extra computational effort and time could be a concern, but it seems less relevant compared to the impact on the data sets.

Leanna 1 year ago

I remember practicing a question about data partitioning, and I think it was mentioned that performing cleansing before partitioning could violate model assumptions.

Destiny 1 year ago

I think one drawback is that it might omit the training and test data sets from the benefits of the cleansing methods, but I'm not entirely sure.

Dulce 1 year ago

Okay, let me think this through. We need to restrict access based on the resource and the HTTP method. That means we need to look at both the resource and the action being performed. So I'm going to go with option C, resource and action.

Irma 1 year ago

Okay, I've got an idea. Since the question is asking about what service consumers' work involves and how technology helps them, I'm guessing the answer is probably related to understanding the customer's perspective and needs. I'll go with Customer engagement.

SAS A00-240 Exam - Topic 3 Question 58 Discussion