√ √
√
4. Determining Standard Error of different Mean of Variable X and Mean of
Variable Y, with formula: √
√ √
√
5. After getting the Mean of each variable and the Standard Error of
different Mean from each variable, Finally, determining t
o
with formula:
After getting the t
hitung
, it is necessary determining Degrees of Freedom df, to know the value of t
tabel
with formula: df
The value of df = 62 is as degree of freedom df. The value of df 62 at the degree of significance 5 0.05 = 1.67
1
see appendix 11 and at the degree of significance 1 0,01 = 2.38.
1
Budi Susetyo. Statistika Untuk Analisis Data Penelitian, Bandung: PT Refika Aditama, 2010, p. 320.
C. Hypothesis Testing
In this research, the writer proposes null hypothesis Ho and alternative hypothesis Ha:
Ho: There is no significance difference of
students’ vocabulary achievement between students who are taught by using
demonstration technique and students who are taught without using demonstration technique.
Ha: There is a significance difference of
students’ vocabulary achievement between students who are taught by using
demonstration technique and students who are taught without using demonstration technique.
The assumption of this hypothesis as follows: If
, the Null Hypothesis H
o
is rejected and alternative hypothesis Ha is accepted. It means there is a significance difference of
students’ vocabulary achievement between students who are taught by using demonstration technique and students who are taught without using demonstration
technique. If t
hitung
t
table
, the Null hypothesis H
o
is accepted and alternative hypothesis Ha is rejected.
There is no significant difference of students’ vocabulary achievement between students who are taught by using demonstration
technique and students who are taught without using demonstration technique.
Based on the description of data calculation, it can be inferred that: 1.
The value of t
hitung
is 5.38 2.
The degree of freedom df is 62, so the value of t
table
in the significance 5 0.05 = 1.67
It shows that t
hitung
t
table
, it means that the Null Hypothesis H
o
is rejected and the Alternative Hypothesis H
a
is accepted.
D. Interpretation of Data
Based on data description, in the seventh grade students’ of MTs. Negeri
13 that the students’ vocabulary is improved, especially by using demonstration
technique. The result of data got from test that divided into pre-test and post-test. It showed from experiment class has the mean of pre-test is 63.85 before giving
demonstration technique. Then, mean increased into 89.90 in post test after given the treatment by using demonstration technique. Therefore, the students that have
the highest mean score of post-test in experiment class, which is given the treatment by using demonstration technique.
In analyzing the data, the writer analyzed the hypothesis of pre-test and post-tests both of class. This step is the main step to know whether demonstration
technique is significant toward the students’ vocabulary achievement or not. The
writer analysis by conducting T-test formula, the significant used 5 0.05, and the criteria is value of t-test t
hitung
t-table. The calculation showed that t-test t
hitung
got 5.38 and the value of t-table is 1.67 in t-student table see appendix 11. It revealed that t-test t
hitung
t
table
5.38 1.67. Based on the criteria for the calculation that when value of t
hitung
t
table
, it means that the hypothesis null Ho is rejected and the alternative hypothesis H
a
is accepted. It can be concluded that there is a significant difference on stude
nts’ vocabulary by using demonstration technique in learning process.
To sum up, the data of research had been conducted based on the procedures. As the interpretation of data calculation above, there is significance
by using demonstration technique toward the students’ vocabulary, because the
results show that the hypothesis of H is rejected and H
a
is accepted. The significance differences are between by using demonstration technique and
without using demonstration technique. In addition, an application of demonstration in learning is a role play that
students or teacher illustrate a procedure and how they do something.
2
It is also make the students get some advantages, they are the students become interested
2
H. Douglas Brown, Teaching by Principles: An Interactive Approach to Language Pedagody, New York: Pearson Education Inc, 2007, p. 185
and excited in learning, the students have super ordinate relationship each other, and make mode of fresh and new simulation in learning process.
3
Therefore, this research can give description of the importance of demonstration technique in
teaching and learning vocabulary. It means will be useful for the teachers and the students that give effect in improving toward the s
tudents’ vocabulary.
3
Louis Cohen and Lawrence Manion, Research Methods in Education, London and New York: Routledge, 1994, p. 265.
39
CHAPTER V CONCLUSION AND SUGGESTION
A. CONCLUSION
After doing the experiment in teaching vocabulary by using demonstration technique and without using demonstration technique, analyzing the data of
experiment, and then the writer continues to conclude it. Based on the data which has been processed, the writer looks that there is a significance
difference of students’ vocabulary between students who are taught by demonstration technique and students
who are taught without using demonstration. It is got from the results of statistic calculation in previous chapter.
The writer got the result of students’ vocabulary achievement between students in experiment class by using demonstration technique and students in control
class without using demonstration technique by comparing the post test score of these two classes. After the writer calculated the data, the writer analyzed the data by using
t-test formula. It is concluded there is a significance of using demonstration technique toward the s
tudents’ vocabulary at seventh grade students of MTs. Negeri 13. Finally, the use of demonstration technique is effective to seventh grade
students at MTs. Negeri 13 of Jakarta. It means that using demonstration technique in teaching and learning vocabulary give improvement to
students’ vocabulary achievement with the score.
B. SUGGESTION
Dealing with the conclusion, the writer would like to give some suggestions as follow:
1. Teacher should improve their ways by using teaching techniques in teaching
vocabulary.
