Student

Group report

scores (a)

Individual scores (b)

Difference (a - b)

Average score

1

Group A—80

67

13

74

2

82

−2

81

3

82

−2

81

4

88

−8

84

5

Group B—88

75

13

82

6

99

−11

94

7

90

−2

89

8

66

22

77

9

Group C—87

88

−1

88

10

90

−3

88

11

66

21

77

12

82

5

85

13

Group D—88

98

10−

93

14

80

8

84

15

90

−2

89

16

69

19

79

Class average

86

82

84