Chapter 3 Chi Squared Tests

Chi Squared Tests

Learning Objectives:

• fit a theoretical distribution, as prescribed by a given 

hypothesis, to given data (questions will not involve 

lengthy calculations);

• use a χ2

-test, with the appropriate number of degrees 

of freedom, to carry out the corresponding goodness 

of fit analysis (classes should be combined so that each 

expected frequency is at least 5);

• use a χ2

-test, with the appropriate number of degrees of 

freedom, for independence in a contingency table (Yates’ 

correction is not required, but classes should be combined 

so that the expected frequency in each cell is at least 5). 

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