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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

___________________________.

AThe residuals when plotted follow a Normal Distribution

BThe sum of the residuals is zero

CAll of the standardized residuals will be within 3 Standard Deviations

DMost standardized residuals are within 2 Standard Deviations

Show Suggested Answer

Suggested Answer: A

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

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Marguerita

1 month ago

Totally agree, C is too strict!

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Twanna

1 month ago

C is the one that doesn't fit.

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Deonna

2 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

2 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

2 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

2 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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