box plot: meaning, definition, pronunciation and examples
Low frequency (C1-C2/Technical domain)Technical / Academic / Scientific
Quick answer
What does “box plot” mean?
A standardised way of displaying a dataset's distribution based on a five-number summary: the minimum, first quartile (Q1), median, third quartile (Q3), and maximum.
Audio
Pronunciation
Definition
Meaning and Definition
A standardised way of displaying a dataset's distribution based on a five-number summary: the minimum, first quartile (Q1), median, third quartile (Q3), and maximum.
A graphical tool used in descriptive statistics to visually show the central tendency, dispersion, and skewness of data, and to identify potential outliers. It consists of a rectangular 'box' representing the interquartile range (IQR) and 'whiskers' extending to the minimum and maximum values within a calculated range.
Dialectal Variation
British vs American Usage
Differences
No significant lexical or conceptual differences. Both varieties use the term identically. The alternative term 'box-and-whisker plot' is equally common in both.
Connotations
None beyond the technical meaning.
Frequency
Identical frequency within the technical domains of statistics and data science in both regions.
Grammar
How to Use “box plot” in a Sentence
[Verb] a box plot (create/generate)a box plot of [Noun Phrase] (a box plot of the results)[Noun] box plot (comparison box plot)Vocabulary
Collocations
Examples
Examples of “box plot” in a Sentence
verb
British English
- We need to box-plot these results to compare the distributions.
- The software can box-plot the data automatically.
American English
- First, box-plot the experimental groups side-by-side.
- The analyst box-plotted the quarterly figures.
adjective
British English
- The box-plot analysis revealed the skew.
- Use the box-plot function in the chart menu.
American English
- She presented a box-plot comparison of the datasets.
- The report included box-plot diagrams in the appendix.
Usage
Meaning in Context
Business
Used in business analytics and reports to summarise performance metrics, sales figures, or customer data distributions, e.g., 'The box plot of regional sales revealed a significant outlier in the North-East division.'
Academic
A fundamental tool in statistics, data science, psychology, and natural sciences for visualising and comparing datasets in research papers and theses.
Everyday
Virtually never used in everyday conversation outside of specific educational or professional contexts involving data.
Technical
The primary context. Used in software (e.g., R, Python's Matplotlib, Excel), statistical reports, scientific publications, and data journalism to communicate distribution characteristics efficiently.
Vocabulary
Synonyms of “box plot”
Strong
Neutral
Weak
Watch out
Common Mistakes When Using “box plot”
- Using 'box plot' to refer to any chart or graph (it is specifically for statistical summaries).
- Pronouncing 'plot' as /pləʊt/ (like in 'plot of land') instead of /plɒt/ (as in 'story plot').
- Forgetting to label the axes or the median line when drawing one.
- Confusing the 'box' with the full range of the data (it only represents the IQR).
FAQ
Frequently Asked Questions
Its main purpose is to provide a quick visual summary of the key characteristics of a dataset's distribution (centre, spread, skewness, and potential outliers) in a standardized format, facilitating easy comparison between multiple groups.
The whiskers typically extend from the edges of the box (Q1 and Q3) to the minimum and maximum data values that lie within 1.5 times the interquartile range (IQR) from the box. Points outside the whiskers are usually plotted individually as potential outliers.
No. A bar chart shows categorical comparisons, and a histogram shows the frequency distribution of a single variable. A box plot is a specific summary diagram based on quartiles, showing less detail about the overall shape but highlighting the median, IQR, and outliers more clearly.
Avoid using a box plot when you need to show the exact shape of a distribution (use a histogram or density plot), when you have a very small dataset (where quartiles are less meaningful), or when you need to show every individual data point to a non-technical audience.
A standardised way of displaying a dataset's distribution based on a five-number summary: the minimum, first quartile (Q1), median, third quartile (Q3), and maximum.
Box plot is usually technical / academic / scientific in register.
Box plot: in British English it is pronounced /ˈbɒks ˌplɒt/, and in American English it is pronounced /ˈbɑːks ˌplɑːt/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think of a 'box' of chocolates: the box (IQR) contains the middle 50% of the chocolates (data), the line inside is the median (the favourite centre), and the whiskers point to the furthest normal chocolates, with any strays outside being the odd-tasting outliers.
Conceptual Metaphor
DATA DISTRIBUTION IS A PHYSICAL LANDSCAPE SUMMARIZED BY A BOX (the core data) WITH REACHING ARMS (the whiskers).
Practice
Quiz
Which of the following is NOT one of the five numbers used to construct a standard box plot?