Focus - Chi Squared

IB Maths Studies: 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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