ASQ CQE Exam - Topic 1 Question 110 Discussion

Actual exam question for ASQ's CQE exam

Question #: 110
Topic #: 1

[All CQE Questions]

Which of the following charts should be used to monitor leaks in plastic bottles?

AX and R

BX and s

Dnp

Show Suggested Answer

Suggested Answer: C

The P chart, also known as the proportion chart, is used to monitor the proportion of defective items in a process. For leaks in plastic bottles, which are attribute data (defective or not), the P chart is appropriate as it helps track the fraction of defective units over time.

Montgomery, D.C. (2009). Introduction to Statistical Quality Control. Wiley.

ASQ. (n.d.). P Chart. Retrieved from https://asq.org/quality-resources/p-chart

by Tyisha at Apr 04, 2025, 04:12 PM

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Derrick

7 months ago

Really? I didn't expect X and R to be the answer.

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Tien

7 months ago

Definitely agree, X and R charts are perfect for that!

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Micaela

7 months ago

Wait, why not just use P charts? Seems simpler!

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Wynell

7 months ago

Not so sure about that, I thought X and s would work too.

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Raymon

8 months ago

I think option A is best for monitoring leaks.

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Alba

8 months ago

I’m leaning towards the X and R chart too, but I wonder if the np chart might actually be more suitable for this kind of defect monitoring.

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Floyd

8 months ago

I feel like the np chart could be relevant since it deals with count data, but I can't recall if it’s specifically for leaks in bottles.

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Nickolas

8 months ago

I remember practicing with X and s charts, but I don't think they apply here since we're looking at defects like leaks.

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Salome

9 months ago

I think we might use the X and R chart for monitoring processes, but I'm not entirely sure if it's the best choice for leaks specifically.

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Leah

9 months ago

I'm a bit confused on this one. Is the goal to monitor the number of leaks or the proportion of leaky bottles? That will determine whether I should be looking at an X-bar and R chart or a P/np chart.

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Salome

9 months ago

I've got this! The key here is that we're looking to monitor a defect, which means we want to use an attribute control chart. That narrows it down to P or np, and since we're monitoring leaks, np would be the appropriate choice.

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Shawna

9 months ago

Hmm, I'm not too familiar with the different types of control charts. I'll need to review my notes on X-bar, R, s, P, and np charts to figure out which one is best for monitoring leaks.

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Shaunna

9 months ago

This looks like a question on statistical process control. I'll need to think about the characteristics of the plastic bottle production process and which chart would best monitor for leaks.

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Vivan

1 year ago

Honestly, I'm just happy there's no 'all of the above' option. That always trips me up on these exams!

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Nada

1 year ago

Hold up, what about the np chart? Isn't that designed for counting defects? Seems like a better fit than the P chart to me.

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Nickole

1 year ago

Hmm, I'm not so sure. Isn't the P chart more suitable for attributes data like pass/fail? Seems like the logical choice here.

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Keneth

1 year ago

Yeah, the P chart seems like the most logical choice for this scenario.

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Serina

1 year ago

I agree, the P chart is typically used for attribute data like pass/fail.

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Carli

1 year ago

I think the P chart is the best option for monitoring leaks in plastic bottles.

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Kati

1 year ago

I think option B is the way to go. X and s charts are perfect for monitoring process variability, which is exactly what we need for leak detection in plastic bottles.

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