Student (S)

Tests

Average

T1

T2

T3

T4

T5

S1

10.5

13

12

10

11.7

11.4

S2

10.5

10

12

11

14

11.5

S3

7.5

6.5

12

13

14

10.6

S4

14.5

20

16

15

14

15.9

S5

14.5

12

13

13

14

13.3

S6

5.5

7.5

12

11

9

9.0

S7

10.5

7.5

12

11

14

11.0

S8

9

13.5

10

11

10

10.7

S9

10

11

12

10

7.5

10.1

S10

10

4.5

11

10

11

9.3

S11

10.5

6

12

11

10.8

10.1

S12

11.5

12.5

13

12

10

11.8

Total average

11.2

Standard deviation

1.9

n

12