CHAPTER III. RESEARCH METHODOLOGY
G. Statistical Hypothesis
This research is designed to find out whether there is a significant effect on the writing ability at seventh-grade students at Islamic private junior high school by using word wall media in teaching writing. Hypotheses are used to find the answer to the research question and draw a conclusion for the research. The hypothesis of research can be formulated as follows:
H0 = to < tt
(There was no effect of using word wall media on students’ writing ability of descriptive text at the seventh-grade of an Islamic private junior high school).
Ha = to > tt
(There was an effect of using word wall media on students’ writing ability of descriptive text at the seventh-grade of an Islamic private junior high school).
And then, the criteria used as follows:
1. If to > tt, the alternative hypothesis (Ha) is accepted and the null hypothesis (Ho) is rejected. It means that there is significant difference of students’
writing ability of descriptive text between students who taught by word wall media and students who taught without using word wall media.
2. If to < tt, the alternative hypothesis (Ha) is rejected and the null hypothesis (Ho) is accepted. It means that there is no significant difference of students’ writing ability of descriptive text between students who taught by using word wall media and students who taught without using word wall media.
12 CHAPTER V
CONCLUSION AND SUGGESTION A. Conclusion
The study observed that using the word wall media in teaching descriptive text writing helped learners learn how to produce descriptive texts and made learning more enjoyable. Based on the initial results, it is possible to infer that the usage of word wall media for teaching seventh-grade students to write a descriptive text substantially influenced students' writing abilities. It could be shown through the statistical analysis in which it was found that the mean score of students' writing achievement in the experimental group was higher than the mean score of the students in the control group. It indicated that the students' writing achievement in the experimental group was better than the mean score of students in the control group.
This research used a quasi-experimental design to gather empirical evidence for the effectiveness of the Word Wall on students' writing ability of descriptive text at Islamic private junior high school in the academic year 2018/2019. According to the previous chapter's data, using the word wall media significantly affects students' writing ability of descriptive text.
In addition, the researcher used Cohen's formula to calculate the effect size. It was also supported by the effect size being classified as a modest effect based on the effect size calculation. In conclusion, this study found that using the word wall media on students' writing ability of descriptive text at seventh-grade had a modest effect size compared to not using it.
B. Suggestion
Based on the conclusion above, the researcher would deliver some suggestions to English teachers, students, and the further researcher.
English Teachers are supposed to give learning strategies for teaching writing in an enjoyable, comfortable, and easy-to-understand way. They can utilize Word Wall media in writing class, and students who employ Word Wall
13
are more enthusiastic about writing English. Before using Word Wall as a medium, English teachers should ensure that their students understand and have all of the relevant knowledge. Moreover, students need to be more active and optimistic when learning English. They are encouraged to be involved in English class and take an active role in growing their vocabulary. Furthermore, the researcher may find additional relevant research on writing in the future, especially in observing the students' writing ability of descriptive text.
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APPENDICES
Appendix 1: Surat Bimbingan Skripsi
Appendix 2: Surat Keterangan Penelitian
Appendix 3: Instrument of Pre-test and Post-test
Appendix 4: Students’ Writing