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Chi-Square test. This test is typically used when you have categorized / paired and continuous /...

Chi-Square test. This test is typically used when you have categorized / paired and continuous / discontinuous data items in a sample

Math   Statistics-And-Probability   
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Chi-Square test is a non-parametric statistical test which typically used to test the "Goodness of fit " and "Test of Independence". Basically Chi-square test is used for the association between two categorical data.  Chi-square independence test evaluates if two categorical variables are related in any way.

The test Statistic for Chi-Square is

Where,

Observed Value

Expected Value

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