II. Research Findings A. Data Description
According to the research methodology of this study, the writer collected the data by using pretest and postest. The test is given to 48
students which consist of 24 students of experimental class and 24 students of controlled class. To know the results of the test, the writer
makes the table of students’ score as follows:
1. Experimental Class Table 3.1
The test score of the experimental class students
Pre Test Post Test
Gained Students
Score Score
Score 1
45 70
25 2
55 75
20 3
50 70
20 4
55 75
20 5
40 55
15 6
60 80
20 7
45 70
25 8
55 80
25 9
55 75
20 10
45 65
20 11
50 70
20 12
55 75
20 13
60 75
15 14
40 60
20 15
55 80
25 16
60 80
20 17
45 65
20 18
55 75
20 19
60 85
25 20
50 70
20 21
65 85
20
22 65
75 10
23 55
70 15
24 65
90 25
From the description above, the writer get the students’ pretest score of experimental class with minimum score is 40 and maximum
score 65, mean is 53,43, median is 53 and mode is 53,03. As described it below:
Table 3.2 The table of frequency distribution of pre-test
No Interva
l f
x fx
x2 fx2
Limit
1 40-43
2 41,5
83 1722,2
5 3444,5
39,5-43,5 2
44-47 4
45,5 182
2070,2 5
8281 43,5-47,5
3 48-51
3 49,5
148,5 2450,2
5 7350,7
5 47,5-51,5
4 52-55
8 53,5
428 2862,2
5 22898
51,5-55,5 5
56-59 57,5
3306,2 5
55,5-59,5 6
60-63 4
61,5 246
3782,2 5
15129 59,5-63,5
7 64-66
3 65
195 4225
12675 63,5-66,5
24 1282,
5 20418,
5 After they are taught by using jigsaw technique, the writer get
the students’ postest score of experimental class with minimum score is 55 and maximum score 90, mean is 74, median is 74.21, and mode
is 74. As described it follows: Table 3.3
The table of frequency distribution of post-test
No Interval
f x
fx x2
fx2 Limit
1 55-60
2 57,5
115 3306,2
5 6612,5
54,5- 60,5
2 61-66
2 63,5
127 4032,2
5 8064,5
60,5- 66,5
3 67-72
6 69,5
417 4830,2
5 28981,5
66,5- 72,5
4 73-78
7 75,5
528,5 5700,2
5 39901,75
72,5- 78,5
5 79-84
4 81,5
326 6642,2
5 26569
78,5- 84,5
6 85-90
3 87,5
262,5 7656,2
5 22968,75
84,5- 90,5
24 1776
32167, 5
133098
2. Controlled Class Table 3.4
The test score of the controlled class students
Pre Test Post Test
Gained Students
Score Score
Score 1
45 55
10 2
40 55
15 3
50 60
10 4
45 55
10 5
55 60
5 6
35 50
15 7
45 60
15 8
55 60
5 9
50 60
10 10
30 50
20 11
50 65
15 12
50 70
20 13
40 55
15 14
55 65
10 15
50 65
15 16
45 55
10 17
60 75
15 18
45 60
15 19
55 65
10 20
45 60
15 21
65 70
5 22
50 55
5 23
60 70
10 24
50 60
10
From the description above, the writer get the students’ pretest score of controlled class with minimum score is 30 and maximum
score 65, mean is 49, median is 49.2, mode is 49. As described it below:
Table 3.5
The table of frequency distribution of pre-test controlled class No Interval
f x
fx x2
fx2 Limit
1 30-35
2 32,5 65
1056,25 2112,5
29,5-35,5 2
36-41 2 38,5
77 1482,25
2964,5 35,5-41,5
3 42-47
6 44,5 267
1980,25 11881,5 41,5-47,5
4 48-53
7 50,5 353,5 2550,25 17851,75 47,5-53,5 5
54-59 4 56,5
226 3192,25
12769 53,5-59,5
6 60-65
3 62,5 187,5 3906,25 11718,75 59,5-65,5 24
1176 14167,5 59298
After they are taught by using conventional method, the writer get the students’ postest score of controlled class with minimum score
is 50 and maximum score 75, mean is 60.66, median is 59.5, and mode is 58.8. As described it follows:
Table 3.6
The table of frequency distribution of post-test controlled class No Interval
f x
fx x2
fx2 Limit
1 50-53
2 51,5 103
2652,25 5304,5
49,5-53,5 2
54-57 6 55,5
333 3080,25
18481,5 53,5-57,5
3 58-61
8 59,5 476
3540,25 28322
57,5-61,5 4
62-65 4 63,5
254 4032,25
16129 61,5-65,5
5 66-69
0 67,5 4556,25
65,5-69,5 6
70-73 3 71,5 214,5 5112,25
15336,75 69,5-73,5 7
74-77 1 75,5 75,5
5700,25 5700,25
73,5-77,5 24
1456 28673,75 89274
B. Data Analysis
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