Question: What is the difference for a 2 x 2 table analyzed with Chi-square test versus with a Mcnemar test? When do you use each test?

  1. What is the difference for a 2 x 2 table analyzed with Chi-square test versus with a Mcnemar test? When do you use each test?

  1. When should a Fisher's exact test be used? How is the probability calculated for a 2 x 2 table in which a is the smallest figure?

  1. How is expected frequency calculated in Chi-square test?

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