Discuss IIBA CBDA Exam Topic 3 Question 40

DIAGRAM

Year-over-Year Sales

300

200

AThe medians and the inter-quartile range is the same in each group

BThe medians and the inter-quartile ranges are different in each group

CThe medians are the same but the inter-quartile ranges are not

DThe 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.

Suggested Answer: B

![Year-over-Year Sales]

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18 comments · newest first

Jules 10 months ago

The variability in 2017 is way higher, no doubt.

Karina 11 months ago

Wait, are we sure about the inter-quartile ranges?

Dick 11 months ago

The medians are definitely different!

Dong 11 months ago

I thought they were the same at first glance!

Yan 11 months ago

Totally agree, 2018 looks stronger.

Billi 11 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.

Barrett 12 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.

Meghan 12 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.

Tammi 1 year ago

I think I remember that the median is the line in the boxplot, but I'm not sure how to compare them accurately.

Carmen 1 year 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.

Melissia 1 year 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.

Fatima 1 year 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.

Penney 1 year 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.

Freida 1 year ago

This looks like a straightforward boxplot question. I'll focus on comparing the medians and interquartile ranges between the two groups.

Elke 1 year 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.

Haydee 1 year ago

The medians and the inter-quartile ranges are definitely different, that's super obvious from the boxplot. B is the clear winner here.

Lavonna 1 year ago

I agree with you. The boxplot clearly shows the differences in medians and interquartile ranges between 2017 and 2018.

Lou 1 year ago

I think the answer is B) The medians and the inter-quartile ranges are different in each group.

IIBA CBDA Exam - Topic 3 Question 40 Discussion