4 Click on the Options tab to open the options dialogue box.
5 Place a tick in Homogeneity of variance tests.
6 Click Continue, and then OK.
G. Hypothesis Test
For hypothesis test, the writer uses t-test to find out whether there is significant difference between experimental class and control class in this study. The writer uses
t-test which is adapted by Anas Sudijono to find the result. There are several steps before applying the t-test formula.
8
The formula of t-test which is used in this research is:
Explanation:
t
o
=
the value of „t’ count M
1
= Mean variable of experimental class M
2
= Mean variable of controlled class SE
M1
= Standard error of experimental class SE
M2
= Standard error of controlled class
The procedures used are as follow: 1.
Determining Mean Variable X: M
1
= 2.
Determining Mean Variable Y: M
2
=
8
Anas Sudijono, Pengantar Statistik Pendidikan, Jakarta: PT Raja Grafindo Persada, 2004, pp. 314-316.
3. Determining Deviation Standard of Score of Variable X:
SD
1
= 4.
Determining Deviation Standard of Score of Variable Y: SD
2
= 5.
Determining Standard Error of Mean Variable X:
SE
M1
= 6.
Determining Standard Error of Mean Variable Y: SE
M1
=
7. Determining Standard Error of difference of Mean Variable X and Mean
Variable Y: SE
M1 - M2
= 8.
Determining t
o
with formula:
t
o
=
9. Determining degrees of freedom:
df = N
1
+ N
2
- 2 Note:
N
1
= The total number of experimental class N
2
= The total number of controlled class
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.
