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Categorical Correlation
Hi,
I like to do two categorical variables correlations. I know I have to do the Chi-Square analysis. The questions I have is how many data points I need to do this? Are there any minimum requirements?
Thanks
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Re: Categorical Correlation
The general rule for the hypothesis test of association with Chi-square is nor more than 20% of the cells have an expected count under 5. JMP will warn you if this condition is discovered.
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Re: Categorical Correlation
The p Value you receive from a Chi Square, will be adjusted for the number of observations. Therefore, it will self adjust for your analysis. However, where Chi Square does fall down, is when you get too many cells where the "Expected" cell frequencies are below 5 that can make the calculations suspect. There is also some discussions on having at least 20 responses.
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Re: Categorical Correlation
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Re: Categorical Correlation
That would be fine
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Re: Categorical Correlation
The general rule for the hypothesis test of association with Chi-square is nor more than 20% of the cells have an expected count under 5. JMP will warn you if this condition is discovered.
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Re: Categorical Correlation
Thanks. That's very helpful.