Welcome to our page on comparing box and whisker plots. This page has two main sections:

Section 1: Two videos which we have created talking through box and whisker plots. This videos are hosted on YOUTUBE and emebedded here for your convenience. Click on them to play them

Section 2: A word example of comparing two box and whisker plots

Alternatively, we have a wide range of videos and revision sheets which you may be interested. Click here to view our homepage

Should you be searching for further information on statistics in general you may find the following useful to review GCSE Statistics Revision Guide - Higher: The Revision Guide

The following resource is also good if you want to work towards your QTS test: How to Pass the QTS Numeracy and Literacy Skills Tests: Essential Practice for the Qualified Teacher Status Skills Tests (Testing Series)

This video, hosted on YOUTUBE, describes how to read a box and whisker plot.

Our following video, hosted on YOUTUBE, discusses how to compare two box and whisker plots

Comparing Box and Whisker Plots

 

We can use the box and whisker plots above to compare the scores of boys and girls in a test.

 

Boys

Girls

Range

Median

Lower Quartile

Upper Quartile

IQR = UQ – LQ

 

Comparison 1: The Boy’s Median is 11. The girl’s median is 1 more than this which suggests the girls’ have done better on average

Comparison 2: The Girls have a larger range, which suggests that (if we include the worst and best scores) then OVERALL the girls are less consistent.

HOWEVER, the girls have a smaller IQR (inter-quartile range) so this means than the MIDDLE 50% of GIRLS are more consistent than the boys middle 50% of scores.