DA0-002 Visualization and Reporting Practice Question
A data analyst wants to show the distribution of customer ages for a retail store. The ages are continuous and the analyst needs to visualize the frequency of different age ranges. Which chart type is most appropriate?
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
✓
Histogram
A histogram is used to display the distribution of a continuous variable by grouping data into bins.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Bar chart
Why it's wrong here
A bar chart plots categorical or binned values on a discrete axis, so it does not natively represent continuous age data without pre-binning. It is tempting because binned ages resemble categories, and it would be correct for comparing counts across discrete groups such as product categories.
- ✗
Line chart
Why it's wrong here
A line chart connects points to show trend over a continuous sequence such as time, so it implies ordered progression rather than frequency distribution of ages. It is tempting because ages are continuous, and it would be correct for plotting a metric's change across a time axis.
- ✗
Pie chart
Why it's wrong here
A pie chart encodes each age value as a slice of a whole, which cannot show frequency distribution across continuous ranges and becomes unreadable with many values. It is tempting for showing proportions, and it would be correct for part-to-whole comparison of a few discrete categories.
- ✓
Histogram
Why this is correct
A histogram bins continuous age values into ranges and plots frequency per bin, directly showing the distribution's shape. It satisfies the stem's constraint that ages are continuous and the analyst needs frequency across age ranges.
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This DA0-002 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the DA0-002 exam.