A teacher figures that final grades in the chemistry department are distributed as: A, 25%; B, 25%; C, 40%; D, 5%; F, 5%. At the end of a randomly selected semester, the following number of grades were recorded. Calculate the chi-square test statistic x to determine if the grade distribution for the department is different than expected. Use =0.01. Grade A B C D F Number 42 36 60 8 14 A) 6.87 B) 0.6375 C) 5.25 D) 4.82