No.

Pretest

Posttest

difference

1

65

71

6

2

86

88

2

3

75

82

7

4

40

43

3

5

105

105

0

6

69

66

−3

7

47

49

2

8

96

94

−2

9

83

86

3

10

62

73

11

11

81

79

−2

12

55

59

4

13

59

63

4

14

98

96

−2

15

96

98

2

16

68

70

2

17

92

92

0

18

65

72

7

19

90

89

−1

20

54

58

4

21

44

46

2

22

65

70

5

23

82

82

0

24

86

80

−6

25

62

68

6

26

56

60

4

27

62

65

3

28

54

60

6

Average

71.32

73.71

2.39

St. deviation

17.85

16.20

3.65