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IASSC ICBB Exam - Topic 3 Question 108 Discussion

A ___________ is used primarily to track the stability of the average value of a metric of interest.
B) Xbar-R Chart
A) NP Chart
C) I-MR Chart
D) C Chart

IASSC ICBB Exam - Topic 3 Question 108 Discussion

Actual exam question for IASSC's ICBB exam
Question #: 108
Topic #: 3
[All ICBB Questions]

A ___________ is used primarily to track the stability of the average value of a metric of interest.

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Suggested Answer: B

by Gerry at Jul 01, 2026, 02:04 PM

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Lorita
3 days ago
I agree with Elina. Xbar-R is the best choice.
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Daniel
8 days ago
NP Chart is for count data, not averages.
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Dana
13 days ago
Yes, it tracks stability well.
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Elina
18 days ago
Xbar-R is for averages, right?
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Daniel
24 days ago
Really? I thought it was A) NP Chart.
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Elina
29 days ago
I think it's B) Xbar-R Chart.
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Yasuko
1 month ago
NP Charts are for proportions, not averages!
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Quiana
1 month ago
Wait, are we sure about that? I thought C Charts were for counts.
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Tanesha
1 month ago
Agreed, Xbar-R is the right choice!
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Lasandra
2 months ago
I thought it was the I-MR Chart? Seems like a close call.
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Linwood
2 months ago
It's definitely an Xbar-R Chart for averages.
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Yolando
2 months ago
I feel like the C Chart is more for counting defects, so I’m pretty confident it’s not that one.
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Cordell
2 months ago
I’m leaning towards the I-MR Chart because it’s used for individual measurements, but I could be mixing it up with something else.
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Cristy
2 months ago
I remember practicing with NP Charts, but I don't think they track averages specifically.
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Mary
3 months ago
I think it might be the Xbar-R Chart since it deals with averages, but I’m not completely sure.
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