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5. Determining Standard Error of Mean of Variable X, with formula:
SEM
X
=
√
=
√
= = 1.7909408
6. Determining Standard Error of Mean of Variable Y, with formula:
SEM
y
=
√
=
√
= = 1.7212544
7. Determining Standard Error of Difference of Mean of Variable X and
Variable Y: SE
MX
-
MY
=
√
=
√
=
√
=
√
= 2.4799194 8.
Determining t
o
with formula: t
o
= =
= 3.6923077 = 3.69
9. Determining t-table in significance level 5 with degree of freedom
df: df =
+ – 2
= 34+ 34 – 2
= 68 – 2
= 66 The value of df degree of freedom of significance 5 or t-table of df 66 = 1,99
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C. The Test Of Hypotheses
The research was held to answer the formulation of the problem; “Is there any significant progress in teaching verbs by using cooperative learning
specifically using jigsaw at the second year of 169 Junior High School Jakarta ?”
To get the answer from the question above, the writer proposed Alternative Hypothesis Ha and Null Hypothesis Ho as follows:
H
a
: There is progress or significant difference between the students‟ understanding of verbs who taught by using
cooperative learning and without using cooperative learning. H
o :
There is no progress or no significant difference between the students‟ understanding of verbs who taught by using
cooperative learning and without using cooperative learning. To prove the hypothesis, the data was obtained from experiment class and
also controlled class was calculated by using t-test formula with the assumption as follows:
1. If t
o
t
t :
The Alternative Hypothesis H
a
is accepted and the Null Hypothesis H
is rejected. It means that there is progress or significant differences after teaching verbs by using
cooperative learning and without using cooperative learning at the second year students of 169 Junior High School Jakarta.
2. If t
o
t
t
: The Alternative Hypothesis H
a
is rejected and the Null Hypothesis H
is accepted. It means that there is no progress or no significant differences after teaching verbs by
using cooperative learning and without using cooperative learning at the second year students of 169 Junior High School
Jakarta According to the calculation above, it was found that the value of the t
was 3.69 and the degree of freedom df was 66. In this research, the writer used the degree of significance 5. It can be seen that df 66 and the degree of
significance of 5 is 1,99. The t-table list can be seen in appendices.
55
The data showed that t was higher than t
t
. Thus, the writer got a conclusion that H
a
is accepted and H
o
is rejected.
D. The Interpretation of Data
From the result of statistical calculation, it was obtained the t-observation t
o
was 3.69; meanwhile, the t-table t
t
of df 66 in significance 5 was 1,99. It means t-observation t
o
was higher than t-table t
t
, so the alternative hypothesis Ha was accepted and the null hypothesis Ho was rejected. Hence, there was
significant progress in learning vocabulary verbs using cooperative learning and without using cooperative learning.
Based on the result above, it can be concluded that teaching verbs by using cooperative learning is more effective than except cooperative learning. It can be
seen from the result above t-test = 3.69 t-table 1,99, which showed the significant difference between the students‟ score of each group experiment class
and controlled class. The writer also concluded that cooperative learning helps the second year
students of SMPN 169 Jakarta in increasing the mastery of verbs. It can be seen from the teaching and learning process which has conducted in the experiment
class for four meetings. In experiment class, the writer gave the students a text, and they have to find out the vocabulary of verbs in the text and they have to
analyze it in the expert group. While they were in the expert group, the writer observ
ed the students‟ performance in group and most of the students did it well. It means, they were responsible in mastery their materials and they were capable
of explaining their materials to the students in their home group. Another thing why jigsaw technique helps the students in increasing the
mastery of verbs is the positive interaction and working in groups. It is a fact when the writer observed the students while they were in the group. The students
made a good interaction with their team and they helped each other. In this case, there were some students who did not understand the materials, but the students
give the spirit to the students who did not understand it. This thing was suitable with the learner‟s role in cooperative learning as an encourager. The higher
56
students also helped the lower students while they were in groups; they eventually made the positive interaction between the higher student and the lower student.
The fun activities which had been implemented in the second and third meeting were not the main things that increased the
students‟ mastery of verbs. It was just a warming-up activity that the teacher can use before implementing
jigsaw technique, the reason why most of the students in experiment class increased in mastery of verbs were the materials that the teacher was made and
the successful of implementing cooperative learning especially jigsaw in teaching verbs in the experiment class. Thus, most of the students in experiment class
increased in mastery of verbs. It can be seen from their result in post test that most of the students in experiment class got the higher score in post-test than their score
in the pre-test. From the explanations above, the writer could make an interpretation that
teaching verbs by using cooperative learning specifically using learning is more effective at the second year students of SMPN 169 Jakarta year 2013-2014.
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CHAPTER V CONCLUSION AND SUGGESTION
A. Conclusion
Understanding verbs is one of the most important things in understanding the meaning of a sentence, because when we want to make a sentence, we also
have to know the verbs itself. In this case, the teacher has to know some varieties of techniques in learning verbs, thus the students will be easy in understanding
and recognizing the verbs. Cooperative learning specifically using jigsaw is one of the alternative
solutions that the teacher can use to teach verbs to their students. It makes students have responsibility to give information to each other. It means that the students
become teacher for their teammates and also by using jigsaw; the students could build the sense of cooperation among the students in group.
After conducted the research, the writer concluded that t
o
is 3.69 t
table
of degree of significance 5 is 1.99. It means that alternative hypothesis is accepted
and the null hypothesis is rejected because the t
o
is higher than t
t
t
o
t
t
or 3.69 1.99.
Therefore, it can be inferred that teaching verbs by using cooperative learning specifically using jigsaw technique is more effective than teaching verbs
without using cooperative learning.
B. Suggestion
From the conclusion above, the writer could give some suggestions for the English teacher who wants to teach the verbs of vocabulary:
a The teacher should be well prepared, it means that before entering
the classroom, the teachers should prepare the material that is going to be taught to the students.
