SD1 = Standard deviation of experimental class
SD2 = Standard deviation of controlled class
H. Statistical Hypothesis
After gaining the t-test, the writer compares T-test and T-table. Testing hypothesis uses criteria with significant degree 0.01. The conclusion is gained as follows:
H is accepted if t
o
t
t
in significant degree 0.01. H
a
is accepted if t
o
t
t
in significant degree 0.01.
H
a
: There is a significant effect after suggestopedia method is used for students’ vocabulary mastery
H : There is no significant effect after suggestopedia method is used
for students’ vocabulary mastery.
29
CHAPTER IV FINDINGS AND DISCUSSION
A. The Description of Data
After presenting the materials to both experimental class and control class, the writer measured students’ vocabulary mastery by using a test. The testing was done in two
classes; those are VIII-7 as an experimental class and VIII-6 as a control class. The writer got the data from objective test which was multiple choice forms of the control
class and experimental class. The test consisted of 25 test items. The accumulation of the correct item was multiplied by 4. So, it would be accumulated to 100 points of
the test.
1. The Data of Experimental Class
In the following table is the score of pre-test and post-test in Experimental Class.
Table 4.1 The Students’ Score of Pre-test and Post-test of Experimental Class
Students’ Number
Experimental Class Gained Score
Pre-Test Post-Test
1 52
68 16
2 48
68 20
3 56
72 16
4 60
80 20
5 56
72 16
6 44
76 32
7 64
72 8
8 44
80 36
9 52
88 36
10 64
80 16
11 68
88 20
12 60
72 12
13 72
88 16
14 64
80 16
Based on the table 4.1 above, the score of pre-test and post-test of experimental class showed that the highest score on the pre-test was 72 and the
lowest score of pre-test was 44 with the average at 58.67. Then, the writer gave the treatment to this class. After giving the treatment by using suggestopedia method, the
post-test was conducted to students. The highest score of post-test was 88 while the lowest score was 68. The average of the post-test was 78.8. The mean of post-test
after giving treatment using suggestopedia method is higher than the mean of pre-test before giving treatments. It means that there was a significant different between the
students ’ comprehension of pre-test and post-test. It can be seen that the
experimental class gained score about 20.13 points.
Students’ Number
Experimental Class Gained Score
Pre Test Post Test
15 56
68 12
16 60
84 24
17 48
76 28
18 56
84 28
19 64
88 24
20 48
72 24
21 72
88 16
22 60
76 16
23 72
84 12
24 68
76 8
25 64
80 16
26 52
88 36
27 68
76 8
28 56
84 28
29 52
76 24
30 60
80 20
∑ n = 30 ∑ X
= 1760 ∑ X1 = 2364
∑ X
2
= 604 Average
58.67 78.8
20.13 MIN
44 68
MAX 72
88
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