49
2. The Analysis of Data
Based on the data collected from post test of experiment and control class, the writer got the average scores of test in experimental class was 81. While of the
average scores of control class was 73. Then, the result calculation both of the post test of experiment and control class are calculated by using t-test formula as
follows: Table 2
The Result of the Post-Test Scores both of Experiment and Control Class
STUDENTS � 1
� 2 x1
x2 �
� 1
81 71
-2 4
2 81
81 8
64
3 81
69 -4
16
4 81
73
5 79
69 -2
-4 4
16
6 85
69 4
-4 16
16
7 77
79 -4
6 16
36
8 85
73 4
16
9 85
71 4
-2 16
4
10 83
69 2
-4 4
16
11 79
79 -2
6 4
36
12 83
67 2
-6 4
36
13 85
71 4
-2 16
4
14 79
75 -2
2 4
4
15 79
71 -2
-2 4
4
16 77
71 -4
-2 16
4
17 85
67 4
-6 16
36
18 77
77 -4
4 16
16
19 79
79 -2
6 4
36
20
85 75
4 2
16 4
21 85
71 4
-2 16
4
22 79
73 -2
4
23 79
83 -2
10 4
100
24 77
73 -4
16
25 79
69 -2
-4 4
16
N=25 2025
1825 216
472
1
=
�
1 1
=
2025 25
=81
50
2
=
�
2 2
=
1825 25
=73
=
1
−
2 � 12 + �2
2 1+ 2 1+ 2 – 2 1. 2
=
81 −73
216 + 472 25+ 25 25+ 25 – 2 25 . 25
=
8
688 50 48 625
=
8
34400 30000
=
8 1.17
=
8 1.08
= 7.4
From the result of statistic, the calculation indicates that the value of is 7.4
Note: = t observation
= t test
3. Hypothesis of Testing Data
From the data analysis, the writer used degree of significant of 5 and 1 to test the writer
’s hypothesis. The calculation is below: df
=
1
+
2
− 2 = 25 + 25
– 2 = 48
The writers gained t-tabel:
51
The degree of significance of t-table of 5 = 2.01 The degree of significance of t-table of 1 = 2.68
As Dr. Anas Sudijono who states in his book that the score of can be found based on
degrees of freedom scores which are included in score table “t” in the degree of significance of 5 and 1.
a. If the result of calculation t
o
t observation is bigger than t
t
t table, ; so the null hypothesis
H
o
is rejected, it means that the difference mean of the sample is significance.
b. If the result of calculation
t observation � �
ℎ� t table,
, so the null hypothesis H
o
is accepted, it means that the difference mean of the sample happen by chance for the sampling error
effect.
1
So, the statistic hypothesis of this research is: 1.
Alternative Hypothesis H
a
: there is significant difference between teaching speaking skill through communicative language teaching and
teaching speaking skill through grammar translation method to the first grade students of Islamic Senior High School of Pembangunan UIN
Jakarta. 2.
Null Hypothesis H
o
: there is no significant difference between teaching speaking skill through communicative language teaching and teaching
speaking skill through grammar translation method to the first grade students of Islamic Senior High School of Pembangunan UIN Jakarta.
The writer finds the result by comparing t observation which the
score is = 7.4 with t table
. .5
= 2.01 and
. .1
= 2.68 so the writer concludes if the score of
is bigger than the score of ; that is: 2.01 7.4 2.68
According to the result of statistic, the calculation indicates that the value of the score of is 7.4 and the value of the degree of significance 5
is 2.01 and 1 is 2.68. It means is bigger than . Therefore, it can be
concluded that �
�
or the writer’s hypothesis is accepted. In other words, there is significance difference between teaching speaking skill through
1
Anas Sudijono, Pengantar Statistik …, p. 8
52
communicative language teaching and teaching speaking skill through grammar translation method to the first grade of Islamic high school of
Pembangunan of UIN Jakarta.
4. The Interpretation of Data
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