Group

N

The proportion of each grade

Excellent

Middling above

Middling

Middling below

Poor

A

54

5.56

20.37

33.33

24.07

16.67

B

71

1.41

29.58

39.44

26.76

2.82

C

72

6.94

19.44

37.50

27.78

8.33

D

70

8.57

17.14

37.14

31.43

5.71

E

62

9.68

30.65

41.94

14.52

3.23