DA0-002 Visualization and Reporting Practice Question
A data analyst wants to visualize the distribution of employee salaries across departments and identify any outliers. Which chart type would best show quartiles, median, and potential outliers?
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
✓
Box plot
A box plot displays the median, quartiles (Q1 and Q3), and outliers, making it ideal for identifying outliers in distribution.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Heat map
Why it's wrong here
Heat maps show intensity across two dimensions, not distribution details.
- ✗
Histogram
Why it's wrong here
Histograms show frequency distribution but do not explicitly highlight outliers.
- ✓
Box plot
Why this is correct
Box plots show five-number summary and outliers.
- ✗
Scatter plot
Why it's wrong here
Scatter plots show relationship between two variables, not distribution of one.
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Written by Johnson Ajibi, MSc IT Security
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