Table 4.2 The Students’ Post-test Scores
Students The Post-test Scores of
Experimental Class Controlled Class
1 71
61 2
75 67
3 71
69 4
74 62
5 70
66 6
81 59
7 72
62 8
70 73
9 76
70 10
71 59
11 73
68 12
70 63
13 73
68 14
74 62
15 71
61 16
73 64
17 73
62 18
74 63
19 74
51 20
76 54
21 69
68 22
71 68
23 70
65 24
72 52
Students The Post-test Scores of
Experimental Class Controlled Class
25 71
57 26
82 62
27 67
61 28
75 71
29 72
62 30
71 62
2182 1892
Mean 72.73
63
The data above are the post-test scores of the experimental class and the controlled class. The post-test was given in the last meeting after the treatment. In the
post-test, the lowest score of the experimental class is 67 and the controlled class is 51. Meanwhile, the median of the experimental class is 71 and the controlled class is
62. Besides, the highest score of the experimental class is 82 and the controlled class is 73. The mean of the experimental class is 72.33 and the controlled class is 63.33.
Therefore, it can be seen that the experimental class has higher significant score than the controlled class. Later, the writer did T-test to know whether post-test score of the
experimental class and the controlled class is different.
c. The Gained Scores
Table 4.3 below reports the gained scores of the experimental class and the controlled class. Both the experimental class and the controlled class have 30
students.
Table 4.3 The Gained Scores of the Experimental Class and the Controlled Class
Students The Gained Scores of
Experimental Class Controlled Class
1 10
2 2
28 13
3 21
9 4
15 2
5 23
7 6
19 5
7 18
15 8
14 11
9 20
8 10
31 13
11 26
17 12
27 20
13 15
35 14
18 7
15 27
5 16
20 4
17 23
17 18
30 10
19 23
8 20
16 10
21 9
21 22
28 16
23 17
11 24
39 11
Students The Gained Scores of
Experimental Class Controlled Class
25 17
7 26
23 4
27 15
21 28
13 9
29 32
5 30
28 18
645 341
Mean 21.5
11.366
The table data above describes that the gained score for the experimental class is higher than the controlled class. The lowest gained score of the experimental class
is 9 and the controlled class is 2, while the highest gained score of the experimental class is 39 and the controlled class is 35. Meanwhile, the median of the experimental
class is 19 and the controlled class is 9. In addition, the mean of gained score in the experimental class is 21.5 and the controlled class is 11.366.
B.
Data Analysis
This section is intended to answer the research question whether jigsaw technique is effective to
improve students’ speaking skill at the second grade of 3 juinior high school, Tanggerang Selatan. T-test was used to answer the research
question and conducted in both the experimental class and the controlled class by using calculation. The following table is the result of the comparison between the
experimental class and the controlled class:
Table 4.4 The Statistical Calculation of the Gain Score of Both the Experimental and the
Control Class
STUDENT X
Y X-MX
Y-MY
X-MX
2
Y-MY
2
1
10 2
-11.5 -9.36
132.25 87.6096
2
28 13
6.5 1.64
42.25 2.6896
3
21 9
-0.5 -2.36
0.25 5.5696
4
15 2
-6.5 -9.36
42.25 87.6096
5
23 7
1.5 -4.36
2.25 19.0096
6
19 5
-2.5 -6.36
6.25 40.4496
7
18 15
-3.5 3.64
12.25 13.2496
8
14 11
-7.5 0.36
56.25 0.1296
9
20 8
-1.5 -3.36
2.25 11.2896
10
31 13
9.5 1.64
90.25 2.6896
11
26 17
4.5 5.64
20.25 31.8096
12
27 20
5.5 8.64
30.25 74.6496
13
15 35
-6.5 23.64
42.25 558.8496
14
18 7
-3.5 -4.36
12.25 19.0096
15
27 5
5.5 -6.36
30.25 40.4496
16
20 4
-1.5 -7.36
2.25 54.1696
17
23 17
1.5 5.64
2.25 31.8096
18
30 10
8.5 -1.36
72.25 1.8496
19
23 8
1.5 -3.36
2.25 11.2896
20
16 10
-5.5 -1.36
30.25 1.8496
21
9 21
-12.5 9.64
156.25 92.9296
22
28 16
6.5 4.64
42.25 21.5296
23
17 11
-4.5 -0.36
20.25 0.1296
24
39 11
17.5 -0.36
306.25 0.1296
