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如何在SAS中使用Fisher的精确检验来计算p值?

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how to calculate P-value by using proc freq ( by fisher exact method) in SAS, as i am getting a warning note while using chisq method in proc freq. WARNING: 25% of the cells have expected counts less than 5. Chi-Square may not be a valid test please provide me syntax and explanation why i am geting this warning? thankshow to calculate P-value by using proc freq ( b




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