Question 463 of 1,672
MLS-C01 Exploratory Data Analysis Practice Question
Which TWO are appropriate visualizations for exploring the distribution of a single numeric variable? (Select TWO.)
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
Options B and E are correct. A histogram displays the frequency distribution of a single numeric variable by binning the data, and a box plot shows the five-number summary (minimum, first quartile, median, third quartile, maximum) to visualize spread and outliers. Option A (heatmap) is typically used for two numeric variables to show density or correlation. Option C (bar chart) is for categorical data, not numeric distribution. Option D (scatter plot) visualizes the relationship between two numeric variables, not the distribution of one.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Heatmap
Why it's wrong here
Heatmap typically shows correlation matrix.
- ✓
Histogram
Why this is correct
Histogram displays frequency distribution of a single numeric variable.
- ✗
Bar chart
Why it's wrong here
Bar chart is for categorical data.
- ✗
Scatter plot
Why it's wrong here
Scatter plot shows relationship between two numeric variables.
- ✓
Box plot
Why this is correct
Box plot shows median, quartiles, and outliers.
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Same concept, more angles
1 more way this is tested on MLS-C01
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A data scientist wants to understand the distribution of a continuous feature before training a model. Which visualization is most appropriate?
easy- A.Scatter plot
- B.Box plot
- ✓ C.Histogram
- D.Bar chart
Why C: A histogram is the standard tool for showing the distribution of a single continuous variable. Option A is wrong because scatter plots compare two variables. Option B is wrong because box plots show summary statistics, not the full distribution shape. Option D is wrong because bar charts are for categorical data.
Last reviewed: Jun 20, 2026
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