# Focus - Chi Squared

The chi squared independence tests is a widely used technique for looking for a relationship between variables that are categorical. We can use a scatter graph to look for a relationship between GDP and life expectancy, but what about GDP and Continent? We cant put continent on a numerical axis. This tool gives us many new options and is an excellent bit of mathematics.Independence Day This is a great thinking exercise...

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## Comments 3

Lesley Twiss17 August 2017 - 00:35Are the summary slides somewhere that I can download them so I can tweak them for my class?

Jim Noble23 August 2017 - 18:14Hi Lesley - not for now, just playable through the website..... out of interest, if they were downloadable, what format would you choose?

MA. Rhosezal Torcuator13 September 2017 - 07:10Hi! Could we have it in pdf or ppt file? thank you

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