The following 23 contingency table contains observed frequencies and expected frequencies (in the brackets) from a sample of 537 observations. Calculate the chi-square test statistic required to test the independence of row and column variables and choose the correct answer from the list of options below.

• A.

  2.54

• B.

  3.27

• C.

  10.36

• D.

  9.40

• E.

  6.36

Row Variable P Column Variable A B 68 (77.56) 87 (83.66) 79 72.77) 110 (100.44) 105 (108.34) 88 (9423)