MLS-C01 Exploratory Data Analysis Practice Question
Which THREE of the following are appropriate data visualization techniques for exploring the relationship between two numerical variables?
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
✓
Scatter plot
Scatter plot, hexbin plot, and pair plot are designed for bivariate numerical relationships. Bar chart is for categorical. Box plot is for numerical vs categorical.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Scatter plot
Why this is correct
Scatter plots directly show the relationship between two numerical variables.
- ✓
Hexbin plot
Why this is correct
Hexbin plots are useful for large datasets to show density of points.
- ✗
Box plot
Why it's wrong here
Box plots show distribution of a numerical variable across categories.
- ✗
Bar chart
Why it's wrong here
Bar charts are for categorical data.
- ✓
Pair plot
Why this is correct
Pair plots show scatter plots for multiple pairs of variables.
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