The EzyEducation website uses cookies to help ensure we give you the best experience.
If you continue without changing your settings, we assume that you are happy to receive all cookies on the EzyEducation website.
Please refer to our Privacy and Cookies Statement to

find out more.

Continue

Please email [email protected] or call 07729 776281/01489 861310 for school or individual enquiries.

Countdown to Exams - Day 22 - Quartiles and box plots

Countdown to Exams - Day 22 - Quartiles and box plots

For day 22 we extend beyond plotting cumulative frequency graphs and look at Quartiles and box plots. Once the graph has been created, we tend to examine it in more detail by looking at the quartiles which are situated at 25%, 50% (the Median) and 75%. An important area we analyse is the Inter Quartile Range (IQR), this tells about the spread of data of the middle 50% of the data.

A box plot is extracted from a cumulative frequency diagram and is made up of five key elements; Highest and lowest value, Upper and lower quartile (75% and 25%) and the median. These become useful when we want to compare tow or more sets of data.

Matt will go through quartiles and IQR and what they mean and then lead into how Box plots are created and how to analyse the data within them.

EzyMaths is the ultimate online GCSE Maths support service. Schools can enjoy a free 30-day trial to see for themselves how EzyMaths can support their teaching and help their students achieve better grades.

Countdown to Exams - Day 23 - Histograms
Countdown to Exams - Day 21 - Cumulative frequency...

Related Posts

 

Comments

No comments made yet. Be the first to submit a comment
Already Registered? Login Here
Guest
Saturday, 15 August 2020
Forgot your password?