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

Question

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 xa 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 OB 0 6375 OC 5 25 D 4 82 Y

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