Students X Post-test Scores of the
Experimental Class Post-test Scores of the
Controlled Class 20
76 40
Σ 1324
1273 Mean
66.20 63.65
As it can be seen from the table 4.2 in the previous page, the minimum score of the post-test score in the experimental class is 43 and in the controlled
class is 40. The post-test was carried out in the last meeting after the treatment was given. If it is compared with the score of the pre-test scores, there is a
significant improvement, especially for the experimental class which has the minimum score 10 in the pre-test, while in the post-test, the minimum score is 43.
Furthermore, the highest score of the post-test both in the experimental class and controlled class is 90. Then, the median score of the post-test in the experimental
class is 66 and in the controlled class is 60. Meanwhile, the mode of the post-test scores in the experimental class is 66 and in the controlled class is 56. The
average score of the post-test in experimental class is 66.20 and in the controlled class is 63.65. Same as the minimum score, the average score for the experimental
class also has a significant improvement. The average score of the pre-test in the experimental class is 43.90, while in the post-test, the average score is 66.20. It
shows that the experimental class has an improvement after the treatment given.The writer also do the t-test of the post-test using SPSS that will be
described in the data analysis.
3. Gained Scores
Table 4.3 below presents gained scores of the experimental class and controlled class. The gained scores were obtained by calculating the scores of pre-
test and post-test; post-test minus pre-test.The description will be explained below the table.
Table 4.3 The Gained Scores of the Experimental Class and the Controlled Class
Students X Gained Scores of the
Experimental Class Gained Scores of the
Controlled Class 1
80-50 = 30 60-57 = 3
2 66-36 = 30
60-36 = 24 3
46-33 = 13 56-26 = 30
4 90-53 = 37
46-63 = -17 5
66-33 = 33 56-43 = 13
6 56-50 = 6
83-83 = 0 7
70-60 = 10 76-50 = 26
8 63-53 = 10
83-96 = -13 9
73-43 = 30 83-93 = -10
10 70-36 = 34
86-93 = -7 11
43-46 = -3 40-36 = 4
12 73-43 = 30
66-63 = 3 13
50-40 = 10 70-76 = -6
14 60-50 = 10
46-40 = 6 15
83-63 = 20 90-83 = 7
16 66-40 = 26
53-43 = 10 17
70-43 = 27 70-76 = -6
18 63-10 = 53
53-30 = 23 19
60-36 = 24 56-90 = -34
20 76-60 = 16
40-26 = 14 Σ
446 70
Mean 22.30
3.50 The scores are processed from
the students’ answer sheets
As it can be inferred from the table of the gained scores above, the students in the experimental class have siginificant improvement in their score of
the pre-test and the post test. The average of the gained score in the experimental class is 22.30, while in the controlled class is 3.50. The experimental class got a
higher average score than the controlled class. From this result, the writer assumed that the experimental class has a significant improvement, which means
that the treatment given was effective to increase their understanding towards the simple past tense. Meanwhile, the lowest gained score in the experimental class is
-3, while in the controlled class is -34. Furthermore, the highest gained score in the experimental class is 53 and in the controlled class is 30. The median of the
gained score in the experimental class is 25 and in the controlled class is 3.5. Then, the mode of the gained score in the experimental class is 30 and in the
controlled class is 3.
B. Data Analysis
In this section the writer will describe the result of the t-test of the three types of scores presented in the data description. Those are pre-test scores, post-
test scores and gained scores. The t-test is the statistical analysis which was performed by using SPSS Statistical Product and Statistic Solution. Here are the
description of the t-test by using SPSS:
1. t-test Analysis of Pre-test
The result of the t-test for the pre-test in the experimental and controlled class is peresented in the table 4.4 in the next page.
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