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Shoe Sizes with Box Plots

Introducing boxplots and using them to compare very large data sets.

Publisher: Texas Instruments UK

Editor: Barrie Galpin

Author: Jay Timotheus

Topic:  Mathematics

Tags  Data ,  Box plots ,  Time series

Students start exploring box plots by considering a very small data set??the shoe sizes of a football team. By comparing the box plot with a dot plot they see how quartiles, the median and the extreme values are produced. Students are challenged to predict how the box plot changes when changes are made to the data set.

The second part of the activity provides four very large data sets: shoe sizes for about 1000 teenagers and 200 adults. Students draw pairs of box plots in order to make comparisons between the data sets.

There is a 2-page handout for students to accompany the .tns file which includes all the data and step-by-step instructions.

This activity forms part of the OxBox, published by Oxford University Press to support their course 'Oxford GCSE Maths'. http://www.oup.com/oxed/secondary/2010gcse/