2. Homogeneity Test
This is intended to test whether the variance of the data in the experimental class and in the control class is equal or not. The formula is:
where:
Notes : = the larger variance
= the smaller variance
115
The hypothesis for the homogenity test were formulated as follows: H
: data have the homogenous variances H
a
: data have not homogenous variances The criteria were:
a. H
o
is accepted if F-
observed
is lower than or equal to F-
critical
means the variance of the data is homogenous.
b. H
a
is rejected if F-
observed
is higher than F-
critical
means the variance of the data is heterogonous.
115
Ibid
., p. 249
3. Hypothetical Test
Since the research used control group pretest-posttest design where there were two groups one control group and one experimental group, the data of this research were
statistically analyzed with independents sample T-test to compare the mean of two different data from different groups.
To measure the hypothesis, the researcher used formula as follows:
Notes: Mx
= mean of control class My
= mean of experimental class ∑x
2
= average deviation in control class ∑y
2
= average deviation in experimental class
N = subject in sample with dƒ= Nx + Ny – 2.
116
The hypothesis were:
H
o
= There is no influence of using audio visual media towards students‟
pronunciation mastery of the eighth grade at the second semester of SMPN 01 Rebang Tangkas Way Kanan in the academic year of 20152016.
116
Suharsimi Arikunto,
Op. Cit
, p. 354
H
a
= There is influence of using audio visual media towards students‟
pronunciation mastery of the eighth grade at the second semester of SMPN 01 Rebang Tangkas way kanan in the academic year of 20152016.
While the criteria of the test were: H
o
= is received if t
observed
t
critical
H
a
= is received if t
observed
t
critical
CHAPTER IV RESEARCH FINDINGS AND DISCUSSION
A. Description of the School
1. The Location of This School
SMPN 1 Rebang Tangkas Way Kanan was located in Rebang Tangkas, Kasui, Way Kanan.
2.
The History of the School
SMPN 1 Rebang Tangkas Way Kanan was built with the name SLTPN 2 Kasui in 1992 and changed its name into SMPN 1 Rebang Tangkas Way Kanan in 2000
because the district was changed from North Lampung to Way Kanan. Now,this school acreditation is still C, but the ways to develop it has been doing by all
members of this school, especially by the principal.
3. The Condition of Students
The activities of teaching learning process have done in the morning and afternoon. In the morning, the class began at 07.15 a.m. and ended at 12.30 p.m. The school has 16 classes
consisted of 7 classes of seventh grade, 4 classes of eight grade and 5 classes of ninth grade. The total number of the teachers is 58 teachers, and the total number of the students is 454
students.
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