b. The Post-test Scores
Table 4.2 reports the students‟ post-test scores of the experimental class and the controlled class. Each class has 30 students as the sample.
Table 4.2 Students’ Post-test Scores
Students The Post-test Scores of
Experimental Class The Post-test Scores of
Controlled Class
1 80
55 2
75 80
3 85
70 4
75 85
5 85
65 6
90 65
7 80
80 8
85 85
9 85
80 10
75 75
11 90
80 12
70 75
13 85
70 14
70 75
15 70
70 16
85 85
17 85
80 18
85 65
19 90
70 20
80 55
21 85
50 22
75 55
23 80
60
Students The Post-test Scores of
Experimental Class The Post-test Scores of
Controlled Class
24 75
55 25
70 80
26 85
85 27
85 70
28 70
75 29
80 65
30 75
80
2.405
2.140 Mean
80.17 71.33
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 70 and the controlled class is 50. Meanwhile, the median of the experimental class is 80 and the
controlled class is 70. Besides, the highest score of the experimental class is 90 and the controlled class is 85. The mean of the experimental class is 77.67 and the
controlled class is 71.33. 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 Gained Scores of Experimental Class and Controlled Class
Students The Gained Scores of
Experimental Class The Gained Scores of
Controlled Class
1 30
-5 2
15 30
Students The Gained Scores of
Experimental Class The Gained Scores of
Controlled Class
3 20
4 25
35 5
40 6
30 20
7 30
10 8
30 45
9 30
35 10
10 25
11 45
35 12
20 10
13 30
35 14
10 15
20 20
16 40
20 17
50 10
18 10
10 19
25 30
20 10
10 21
40 -20
22 20
5 23
45 5
24 15
-15 25
15 30
26 35
20 27
35 20
28 15
29 5
10 30
20 5
Mean 25.50
14.50
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