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IIBA CBDA Exam - Topic 3 Question 40 Discussion

DIAGRAMYear-over-Year Sales300200
B) The medians and the inter-quartile ranges are different in each group
A) The medians and the inter-quartile range is the same in each group
C) The medians are the same but the inter-quartile ranges are not
D) The inter-quartile ranges are the same but the medians are not Explanation: According to the Guide to Business Data Analytics, a boxplot is used to provide a visual summary of one or more groups of data values through their quartiles. In this case, the boxplot shows two different years, 2017 and 2018, with distinct medians and interquartile ranges. The median is represented by the line inside the box, while the interquartile range is represented by the height of the box itself. Outliers are marked with circles above and below the box. From the boxplot, we can see that the median sales for 2018 are higher than the median sales for 2017, and the interquartile range for 2018 is narrower than the interquartile range for 2017. This means that the sales for 2018 are more concentrated around the median and have less variability than the sales for 2017. Therefore, the correct answer is B.

IIBA CBDA Exam - Topic 3 Question 40 Discussion

Actual exam question for IIBA's CBDA exam
Question #: 40
Topic #: 3
[All CBDA Questions]

DIAGRAM

Year-over-Year Sales

300

200

Show Suggested Answer Hide Answer
Suggested Answer: B

![Year-over-Year Sales]

by Eleonore at Aug 14, 2025, 03:06 AM

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Jules
6 months ago
The variability in 2017 is way higher, no doubt.
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Karina
6 months ago
Wait, are we sure about the inter-quartile ranges?
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Dick
6 months ago
The medians are definitely different!
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Dong
7 months ago
I thought they were the same at first glance!
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Yan
7 months ago
Totally agree, 2018 looks stronger.
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Billi
7 months ago
I definitely remember that the boxplot gives a good visual summary, but I’m confused about whether the medians can be the same while the ranges differ.
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Barrett
7 months ago
I feel like the medians might be different based on the boxplot, but I can't recall if the inter-quartile ranges are the same or not.
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Meghan
7 months ago
I practiced a similar question where the inter-quartile ranges were the focus, and I think they can show how spread out the data is.
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Tammi
8 months ago
I think I remember that the median is the line in the boxplot, but I'm not sure how to compare them accurately.
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Carmen
8 months ago
This seems like a standard question on boxplots. I'll methodically go through the answer choices and select the one that best describes the differences I observe in the diagram.
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Melissia
8 months ago
I'm a bit confused by the question. I'll need to review my notes on interpreting boxplots to make sure I understand how to compare the medians and ranges.
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Fatima
8 months ago
Okay, I've got this. The key is to identify whether the medians and interquartile ranges are the same or different between the two groups.
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Penney
8 months ago
Hmm, the diagram is a bit tricky to interpret. I'll need to carefully examine the box plots and pay attention to the differences in the medians and ranges.
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Freida
9 months ago
This looks like a straightforward boxplot question. I'll focus on comparing the medians and interquartile ranges between the two groups.
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Elke
9 months ago
I'm not sure, but I think the medians are different because the line inside the box is at different heights for each year.
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Haydee
9 months ago
The medians and the inter-quartile ranges are definitely different, that's super obvious from the boxplot. B is the clear winner here.
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Lavonna
9 months ago
I agree with you. The boxplot clearly shows the differences in medians and interquartile ranges between 2017 and 2018.
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Lou
10 months ago
I think the answer is B) The medians and the inter-quartile ranges are different in each group.
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