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ASQ CQA Exam - Topic 4 Question 122 Discussion

An auditor is performing an audit of a drilling machine that produces 100 pieces a day and that is showing improved quality. Which of the following rules should be used for determining the proper sample size for a fixed level of confidence?
B) The sample size should be decreased as the quality improves.
A) The moving average should be calculated.
C) The AQL of the raw material should be used.
D) A 10% sample size should be used, regardless of the change in quality.

ASQ CQA Exam - Topic 4 Question 122 Discussion

Actual exam question for ASQ's CQA exam
Question #: 122
Topic #: 4
[All CQA Questions]

An auditor is performing an audit of a drilling machine that produces 100 pieces a day and that is showing improved quality. Which of the following rules should be used for determining the proper sample size for a fixed level of confidence?

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Suggested Answer: B

by My at Mar 06, 2026, 03:49 PM

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Chi
11 hours ago
I disagree, A is more relevant. Moving averages help track trends effectively.
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Rana
6 days ago
I think B is the best choice. Improved quality means we can reduce the sample size.
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Johnetta
11 days ago
Totally agree, AQL makes the most sense here!
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Sonia
16 days ago
Moving averages aren't really about sample size, right?
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Janae
2 months ago
Wait, why would we use a fixed 10% sample size? That seems off.
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Jina
2 months ago
I think the sample size should decrease as quality improves!
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Sylvie
2 months ago
AQL of the raw material is key for sample size.
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Malissa
3 months ago
Quality improving means we should definitely adjust sample size!
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Merilyn
3 months ago
Totally agree, moving average isn't really relevant here.
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Melynda
3 months ago
Wait, how can we just assume 10% is always right?
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Odelia
3 months ago
I think the sample size should decrease with better quality.
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Katina
3 months ago
AQL of the raw material is key for sample size!
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Elvera
3 months ago
I recall that moving averages can help in understanding trends, but I’m not clear on how they relate to sample size determination in this context.
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Terrilyn
4 months ago
I feel like the 10% rule is a common guideline, but I’m not convinced it’s the best approach if quality is changing.
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Sherita
4 months ago
I think we practiced a question similar to this where we had to decide if the AQL was relevant. I wonder if it applies here too.
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Judy
4 months ago
I remember discussing how sample size can be influenced by quality improvements, but I'm not sure if it should always decrease.
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