Table 4.8 Result Calculation of Post-test of Control Class
d. Determining Mean of Variable Y, with formula: M
2
= M ʹ + i
ʹ
= 60 + 7 = 60 + 7 0.12
= 60 + 0.84 = 60.84
e. Determining Standard of Deviation Score of Variable Y, with formula: SD
2
= i √
∑ ʹ ∑ ʹ
= 7
√
= 7 √
= 7 √
= 7 1.61 = 11.27
Interval Score F
Yi y
ʹ Fy
ʹ fy
ʹ ²
36 —42
4 39
3 12
36 43
—49 2
46 2
4 8
50 —56
7 53
1 7
7 57
—63 7
60 64
—70 5
67 -1
-5 5
71 —77
7 74
-2 -14
28 N= 32
∑fyʹ =4 ∑fyʹ ²=84
f. Determining Standard Error of Mean of Variable Y, with formula: SE
M
2
=
√
=
√
=
√
= = 2.02
g. Determining Standard Error of Difference of Mean of Variable X and Variable Y, with formula:
SE
M
1
– M
2
= √
= √
= √
= √
= 2.70
h. Determining t
o
with formula: t
o
=
=
–
= 4.30
i. Determining t-table in significance level 5 and 1 with the degree of freedom df = N1 + N2
– 2 = 32 + 32 – 2 = 62. From the t-table t
t
, df = 62 with the degree of significance 5 is 1.99 and with the1 degree of significance is 2.65 see t table list.
j. The comparison between t
o
and t-table The result calculation above showed that the score of experiment class
wass higher than the control class. The following is a comparison between t
and t
table
to test the hypothesis: 1.99 4.30 2.65 = t
t
table
3. Test of the Hypothesis
The researcher’s hypothesis to this to this research, as has been stated on the previous chapter, is that the using of STAD is effective for students of SMP
Trimulia Jakarta in understanding of the simple past tense and that there is a significance difference of the students’ score of the simple past tense who are
taught by using the STAD H
a
. From the research calculation above it can be concluded that that t
t
table
, hence the validity of researcher’s hypothesis to this
research has been proven and accepted.
B. Interpretation
From the previous result of the statistical calculation, it can be seen that the students’ average score of the experiment class was higher
66.62
than the average score of the control class 58.50. Further calculation also showed the
value of t was 4.30 with the degree of freedom 62 n + n
– 2. The 5 and 1 degree of significance was used to this research. Based on the t
table
, degree of freedom 62 was on the degree of significance 5 in the value 1.99 and 1 in the
value of 2.65 of the t-
test
Table. Comparing the gained value of t
with t
table,
it can be inferred that there was an obvious differences among the score of experiment class and control class. The
t value was higher than the t
table
, namely 1.99 4.30 or 4.30 2.65. To this
calculation, we can look back to the statistical hypothesis which stated that if t t
table
it means that the alternative hypothesis Ha was accepted and the null hypothesis Ho was rejected, which indicated the using the Student Teams
Achievement Divisions STAD technique was effective and had a significance difference for students of SMP Trimulia in understanding the simple past tense.
Consequently, it has been proven that the using of Student Teams Achievement Divisions STAD technique had effectiveness for students of SMP Trimulia in
understanding the simple past tense.
49
CHAPTER V CONCLUSION AND SUGGESTIONS
A. Conclusion
Based on the data analysis, result and interpretation, it can be seen that the students who were taught by using the STAD technique, had higher score than
students who were not taught by using it in understanding the simple past tense. It has been figured out in the calculation of the mean or average score from both
classes. Further, the result of the t-test calculation showed the experiment class had higher score than control class and also by comparing the t
with the t
table
which showed the final result is t t
table
. Hence, the conclusion can be made that the alternative hypothesis H
a
is accepted and in contrary the null hypothesis H
o
is rejected. This means that the Student Teams Achievement Divisions STAD technique is effective to be used
for students of SMP Trimulia in understanding the simple past tense.
B. Suggestions
Considering the result of the research, some suggestion would like to give which might be useful either for the teacher or the students, particularly in
teaching and learning activities of the simple past tense in the classroom. Firstly, the suggestion is delivered to the English teacher that she should create an
alternative or difference way in developing the teaching of English, especially the simple past tense because it is sometimes quite difficult and bored for students to
be learnt. Teacher should at least introducing a new method which will attract students to learn simple past tense, that is the using of STAD technique, so
students will have a new experience, knowledge and learning situation which different from what they had before. Further, teacher should at least prepare all
the things well that will be needed during teaching by using the STAD which includes giving the students some rewards so that it will more attract students to
get involves to learn with their team. Finally for the students, they should pay
attention to the teacher so that they will understand what teacher delivered in the classroom. Students need to be more active, since they are working together with
the team. It was hoped that the STAD technique not only promotes the students understanding and
awareness of the simple past tense but also students’ awareness of learning cooperatively with others.
