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SAS A00-240 Exam - Topic 3 Question 36 Discussion

A non-contributing predictor variable (Pr > |t| =0.658) is added to an existing multiple linear regression model.What will be the result?
A) An increase in R-Square
B) A decrease in R-Square
C) A decrease in Mean Square Error
D) No change in R-Square

SAS A00-240 Exam - Topic 3 Question 36 Discussion

Actual exam question for SAS's A00-240 exam
Question #: 36
Topic #: 3
[All A00-240 Questions]

A non-contributing predictor variable (Pr > |t| =0.658) is added to an existing multiple linear regression model.

What will be the result?

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Suggested Answer: A

by Chanel at May 05, 2022, 04:55 PM

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Valentine
10 months ago
Yeah, it just adds noise without improving the model.
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Tandra
10 months ago
I thought adding variables always increased complexity, not stability.
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Hillary
11 months ago
Wait, are you sure? I thought it could mess things up.
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Pete
11 months ago
Totally agree, it should stay the same!
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Sherly
11 months ago
Adding a non-contributing variable won't change R-Square.
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Bea
11 months ago
I thought that R-Square could only increase or stay the same, so I’m leaning towards no change in R-Square.
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Elke
11 months ago
I feel like adding a variable that doesn't contribute could actually decrease the model's efficiency, but I can't recall if that affects R-Square directly.
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Jeffrey
11 months ago
I remember that adding a non-contributing variable shouldn't really affect the R-Square, but I'm not entirely sure.
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Loren
11 months ago
I think I practiced a question like this, and it mentioned that R-Square always increases or stays the same, so maybe it won't change?
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Arthur
11 months ago
This one seems straightforward to me. The script is not running, so I need to look at the options and see which ones address that issue directly. I'll go with A and B, as they seem the most relevant.
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Lonny
12 months ago
Hmm, I'm a bit unsure about this one. The TOGAF template has a lot of different sections, and I'm not entirely familiar with the specifics of each one. I'll have to think this through carefully.
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Dallas
12 months ago
I remember something about log files being in flash memory, like in a practice question we did. Was it flash:/ ?
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