Technique of Data Analysis

G. Hypothesis of Statistic

The hypothesis of statistic that will be used in this research is: H o : µ 1 = µ 2 H a : µ 1 ≠ µ 2 H o : Null hypothesis H a : Alternative hypothesis µ 1 : Students’ narrative writing achievement, who are taught by using English comic strips. µ 2 : Students’ narrative writing achievement, who are taught without using English comic strips. The assumption of the hypothesis as follows: 1. If t o t table, the null hypothesis H o is rejected and the alternative hypothesis H a is accepted. It means that there is significant difference between the students’ score in learning narrative writing by using English comic strips and the students’ score in learning narrative writing without using English comic strips at the eighth grade students of SMP Islam Al-Ikhlas µ 1 ≠ µ 2 . 2. If t o t table , the null hypothesis H o is accepted and the alternative hypothesis H a is rejected. It means that there is no significant difference between the students’ score in learning narrative writing by using English comic strips and the students’ score in learning narrative writing without English comic strips at the eighth grade students of SMP Islam Al-Ikhlas µ 1 = µ 2 . 35

CHAPTER IV RESEARCH FINDING

A. Data Description

Before doing the calculation by using t-test , the data of students’ pretest and posttest scores of experimental and controlled class that had been collected is described in the tables as follows: Table 4.1 Students’ Score of Experimental Class No. Pretest Postest Gained Score 1 58 86 28 2 45 73 28 3 36 59 23 4 61 80 19 5 68 85 17 6 40 66 26 7 44 70 26 8 53 81 28 9 60 87 27 10 58 72 14 11 61 80 19 12 40 67 27 13 73 84 11 14 46 69 23 15 72 87 15 16 50 80 30 17 44 79 35 18 68 85 17 19 57 70 13 20 43 86 43 21 74 88 14 22 36 83 47 23 48 85 37 24 71 86 15 25 57 70 13 26 42 75 33 27 69 80 11 28 75 88 13 Total 1549 2201 652 Mean 55.32

78.61 23.29

Based on the table above, it could be seen that the score of students’ pretest and posttest in the experimental class were different. The mean of students’ score in the pretest was 55.32 with the lowest score, 36, and the highest score was 75. Meanwhile the mean score of posttest was 78.61 with the lowest score, 59, and the highest score, 88. Table 4.2 Students’ Score of Controlled Class No. Pretest Posttest Gained Score 1 39 64 25 2 51 62 11 3 66 45 -21 4 50 70 20 5 63 71 8 6 47 43 -4 7 58 65 7 8 42 66 24 9 68 68 10 45 77 32 11 61 70 9 12 67 59 -8 13 60 80 20 14 55 54 -1 15 40 79 39 16 57 59 2 17 36 65 29 18 54 72 18 19 63 70 7 20 69 56 -13 21 52 61 9 22 70 57 -13 23 62 62 24 65 74 9 25 48 68 20 26 77 82 5 27 67 76 9 28 49 60 11 Total 1581 1835 254 Mean 56.46

65.54 9.07

Based on the table above, the mean of students’ score in the pretest was 56.46 with the lowest score, 36, and the highest score, 77. Meanwhile the mean score of posttest was 65.54 with the lowest score, 43, and the highest score, 82. Based on the data in the tables above, it showed that the students’ achievement in writing narrative text by using English comic strips in experimental class was higher than the students in controlled class without English comic strips. It was also described by the figure of chart below: Figure 4.1 Mean Score of Pretest, Posttest, and Gained Score of Experimental and Controlled Class

B. Data Analysis

The data of students’ score was analyzed by using t-test to prove whether there was any significant different between student s’ ability in writing narrative text in the experimental class as the X variable and controlled class as the Y variable. But, before using the formula of t-test, t he students’ score in the experimental and controlled class were tabulated to calculate the gained score of each class. It could be seen as follows: 10 20 30 40 50 60 70 80 90 100 Experimental Class Controlled Class Pretest Posttest Gained Score