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IASSC ICBB Exam - Topic 5 Question 102 Discussion

A valid mathematical Regression represents all of the characteristics shown except___________________________.
A) The residuals when plotted follow a Normal Distribution
B) The sum of the residuals is zero
C) All of the standardized residuals will be within 3 Standard Deviations
D) Most standardized residuals are within 2 Standard Deviations

IASSC ICBB Exam - Topic 5 Question 102 Discussion

Actual exam question for IASSC's ICBB exam
Question #: 102
Topic #: 5
[All ICBB Questions]

A valid mathematical Regression represents all of the characteristics shown except

___________________________.

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Suggested Answer: A

by Yuki at Apr 02, 2026, 05:16 AM

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Roslyn
4 days ago
I feel like B is also a good choice. The sum of residuals being zero is a common property.
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Bonita
9 days ago
I agree, C makes sense. It’s too strict for regression.
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Avery
15 days ago
I think the answer is C. Not all standardized residuals need to be within 3 SD.
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Emelda
20 days ago
I thought it was normal for some to be outside 2 SDs.
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Gearldine
25 days ago
B is a must for valid regression, right?
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Desiree
1 month ago
Wait, are all standardized residuals really supposed to be within 3 SDs?
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Marguerita
3 months ago
Totally agree, C is too strict!
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Twanna
3 months ago
C is the one that doesn't fit.
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Deonna
3 months ago
I’m a bit confused about the normal distribution part. I thought the residuals should follow a normal distribution, but I guess it could be an exception in some cases?
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Katlyn
4 months ago
I feel like most standardized residuals being within 2 standard deviations is a common characteristic, so I’m leaning towards A or C as the answer.
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Kanisha
4 months ago
I remember practicing a question about residuals, and I think the sum of residuals being zero is a key property of regression. So maybe it's not B?
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Kimberlie
4 months ago
I think the answer might be C, but I'm not entirely sure if all standardized residuals have to be within 3 standard deviations.
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