Which of the following statements IS NOT an assumption of the Pearson chi‐squared test for a contingency table in order for it to be valid?

A. The data comprise two unordered categorical variables.

B. At least 80% of the expected cell counts should be >5.

C. All expected cell counts should be ≥1.

D. All the observed cell counts should be ≥1.

E. The null hypothesis is that there is no association between the row and column variables.