DA0-002 Visualization and Reporting Practice Question
A dataset contains salaries ranging from $25,000 to $2,500,000, with most salaries under $100,000. Which chart type best shows the distribution without distortion from extreme values?
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
Box plot. Box plots display the distribution through quartiles and explicitly show outliers as individual points, making them ideal for skewed data with extreme values. In contrast, a scatter plot (B) is for relationships between variables, not distribution; a histogram (C) with equal bin widths would compress the majority of the data into a single bin if bins are sized to include the extreme values; and a line chart (D) is for trends over time. Therefore, the box plot best shows the distribution without distortion from extreme values.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Box plot
Why this is correct
Box plots show median, quartiles, and outliers, handling skew well.
- ✗
Scatter plot
Why it's wrong here
Scatter plots are for bivariate relationships, not distribution of a single variable.
- ✗
Histogram with equal bin widths
Why it's wrong here
Equal bin widths may obscure the distribution due to extreme values; log scale needed.
- ✗
Line chart
Why it's wrong here
Line charts are for time series, not distribution.
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