No.

Pretest

Posttest

difference

1

59

70

11

2

91

91

0

3

64

65

10

4

60

65

9

5

49

55

8

6

73

74

7

7

81

83

6

8

89

89

5

9

61

64

82

10

75

79

4

11

73

74

3

12

63

65

2

Average

69.83

72.83

3

St. deviation

12.77

10.97

3.16