DA0-002 Data Analysis Practice Question
A data analyst is analyzing survey responses where respondents rated satisfaction on a scale of 1-5. The analyst wants to visualize the distribution of responses. Which chart type is most appropriate?
⚠ Common exam trap
Candidates often confuse a histogram with a bar chart, but the key distinction is that a histogram is used for quantitative (ordinal or continuous) data where bin order matters, while a bar chart is for categorical (nominal) data with no inherent order.
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 most appropriate chart for visualizing the distribution of a single discrete variable, such as satisfaction ratings on a 1-5 scale. It groups the responses into bins (each rating value) and displays the frequency of each bin using bars, clearly showing the shape, central tendency, and spread of the data.
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 it's wrong here
Box plots show summary statistics but not the full frequency distribution.
- ✗
Scatter plot
Why it's wrong here
Scatter plots show relationships between two variables, not distribution of one.
- ✗
Line chart
Why it's wrong here
Line charts are used for trends over time, not for distribution of a single variable.
- ✓
Histogram
Why this is correct
Histograms display the frequency distribution of a single numeric variable across bins.
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