DA0-002 Visualization and Reporting Practice Question
An analyst creates a histogram of customer transaction amounts but observes that the distribution looks bimodal. Upon review, the analyst realizes that two different customer segments (retail and wholesale) were combined. Which action best addresses this?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create two separate histograms, one for each segment
Splitting the data into two separate histograms by segment reveals the distinct distributions. Changing bin width may hide or exaggerate features. Combining into one chart with color is possible but may still obscure the bimodal nature if overlapping. A box plot shows medians but not shape.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Create two separate histograms, one for each segment
Why this is correct
Separate histograms clearly show each segment's distribution and the reason for bimodality.
- ✗
Use a single histogram with two colors for segments
Why it's wrong here
Overlapping histograms might be confusing if segments overlap.
- ✗
Use a box plot instead of a histogram
Why it's wrong here
Box plot shows summary stats but not the shape of the distribution.
- ✗
Increase the number of bins to see more detail
Why it's wrong here
More bins may show noise but does not separate the two segments.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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