MLS-C01 Box plot Practice Question
A data scientist is performing EDA on a dataset with both numeric and categorical features. Which TWO techniques are appropriate for visualizing the relationship between a numeric feature and a binary categorical target?
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
✓
Violin plot grouped by target
Correct options are C (violin plot grouped by target) and D (box plot grouped by target). Both are effective for visualizing the distribution of a numeric feature across two categories of a binary target. A violin plot combines a box plot and a density plot, showing the full distribution shape, while a box plot displays medians, quartiles, and outliers. Option A (histogram) shows distribution of a single numeric variable but does not directly compare groups. Option B (stacked bar chart) is for categorical vs categorical data. Option E (scatter plot) is for two numeric variables.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Histogram
Why it's wrong here
Histogram shows distribution of a single numeric variable.
- ✗
Stacked bar chart
Why it's wrong here
Stacked bar chart is for categorical-categorical relationships.
- ✓
Violin plot grouped by target
Why this is correct
Violin plots show distribution and density across categories.
- ✓
Box plot grouped by target
Why this is correct
Box plots compare numeric distributions across categories.
- ✗
Scatter plot
Why it's wrong here
Scatter plot is for two numeric variables.
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