Box-and-Whisker Plot

Definition of Box and Whisker Plot

  • A box-and-whisker plot shows the distribution of a set of data along a number line, dividing the data into four parts using the median and quartiles.


Examples of Box-and-Whisker Plot

  • A sample of box-and-whisker plot is shown below.


Solved Example on Box-and-Whisker Plot

The box-and-whisker plot below shows the amount of calories in some bakery items. Use it to find the difference between the upper and lower quartiles.




A. 150

B. 650

C. 500

D. 250

Correct Answer: A


Step 1: From the box-and-whisker plot shown, we learn that the upper quartile value is 650 and the lower quartile value is 500.

Step 2: So, the difference between the two values is 650 - 500 = 150.


Related Terms for Box-and-Whisker Plot

  • Quartile
  • Lower Quartile
  • Middle Quartile
  • Upper Quartile
  • Median
  • Number Line
  • Least Value
  • Greatest Value


Real-world Connections for Box-and-Whisker Plot

  • Box-and-whisker plots are useful in comparing data.
For example, the prices of different commodities,  weights of students in a class, your test scores, etc can be compared using box-and-whisker plots.

Additional Links for Box-and-Whisker Plot