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IASSC ICBB Exam - Topic 5 Question 95 Discussion

Actual exam question for IASSC's ICBB exam
Question #: 95
Topic #: 5
[All ICBB Questions]

If in an experiment all possible variable pairs sum to zero the design is Orthogonal.

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Suggested Answer: A

by Alba at Aug 18, 2025, 08:56 AM

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Felix
4 months ago
Totally agree, it's a key feature of orthogonality!
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Carolann
4 months ago
Wait, really? All pairs summing to zero? Sounds odd.
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Marta
4 months ago
True, that's how orthogonal designs work!
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Theron
5 months ago
I thought it was about independence, not just sums.
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Nohemi
5 months ago
Not sure about that, seems too simplistic to me.
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Soledad
5 months ago
I’m pretty uncertain about this one. I remember orthogonality being important, but the zero-sum part is throwing me off.
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Lucy
5 months ago
I’m leaning towards True because I think orthogonal designs have to do with balancing variables, but I could be mixing it up with something else.
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Blair
6 months ago
I feel like I saw a similar question in practice that mentioned orthogonal designs, but I can't recall the exact definition.
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Jesus
6 months ago
I think I remember something about orthogonality in designs, but I'm not sure if it specifically relates to variable pairs summing to zero.
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Barb
6 months ago
Hmm, the wording of this question is tripping me up a bit. Let me re-read it carefully and think through the definition of an orthogonal design. I want to make sure I have the right understanding before answering.
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Johanna
6 months ago
Ah yes, I remember now! If all possible variable pairs sum to zero, then the design is considered orthogonal. That makes sense. I'll mark True for this one.
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Dong
6 months ago
I'm a bit unsure about this one. I know orthogonal designs have some property related to variable pairs, but I can't quite recall the specifics. I'll have to think it through step-by-step.
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Brandon
6 months ago
Okay, this seems straightforward. If all variable pairs sum to zero, then the design must be orthogonal. I'm confident this is the right answer.
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Rutha
7 months ago
Hmm, I think I remember learning about orthogonal designs in class. Let me think this through carefully.
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Mohammad
7 months ago
True, orthogonal designs are so elegant. It's like a secret handshake for the data analysis club.
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Maia
7 months ago
I think the statement is true.
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Stefany
7 months ago
I remember this from my statistics class. This is the key characteristic of an orthogonal design. Easy question!
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Melissia
3 months ago
Exactly! Orthogonal designs are so useful in experiments.
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Bok
4 months ago
It makes sense! Zero sums mean independence.
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Antione
4 months ago
Yes, I remember learning about orthogonality in design.
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Andra
4 months ago
I totally agree! It's a fundamental concept.
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Katlyn
8 months ago
Definitely true. If the variable pairs don't sum to zero, then it's not an orthogonal design.
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Denise
7 months ago
True
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Kristel
8 months ago
True, that's the definition of an orthogonal design. All variable pairs must sum to zero.
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Isadora
7 months ago
That's correct. In an orthogonal design, all variable pairs sum to zero.
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Adelle
7 months ago
A) True
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