DA0-002 Visualization and Reporting Practice Question
Which chart type is best for showing the distribution of a continuous variable, such as customer ages?
⚠ Common exam trap
Watch out — candidates often confuse a histogram with a bar chart, thinking both use bars for 'counts,' but fail to recognize that histograms require continuous numeric bins with no gaps, while bar charts use categorical labels with gaps.
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 the correct choice because it groups continuous data (like customer ages) into bins along a continuous x-axis, displaying the frequency distribution through bar heights. This directly shows the shape, spread, and central tendency of the variable, which is the core requirement for visualizing a continuous 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.
- ✗
Bar chart
Why it's wrong here
Bar charts are for categorical data, not continuous.
- ✗
Pie chart
Why it's wrong here
Pie charts show proportions of a whole.
- ✗
Box plot
Why it's wrong here
Box plots show quartiles and outliers but not the full distribution shape.
- ✓
Histogram
Why this is correct
Histograms display the distribution of a continuous variable.
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