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

Video Examples: Box and Whisker Plot

Solved Example on Box and Whisker Plot

Ques: 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.

Choices:

A. 150 
B. 650 
C. 500 
D. 250 
Correct Answer: A

Solution:

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.

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.

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