taught by using video has a better achievement in listening than those taught without using video.
1. First Hypothesis
To test whether the first hypothesis is accepted or not, the writer uses t-test formula to analyze the data. The data which are analyzed in this research are pre-
test and post-test scores of the two groups, experimental group and control group. The following is the procedures to apply t-test.
a. Determining the degree of freedom. df = n
1
+ n
2
– 2 = 40 + 40 -2
df = 78
The t
table
t
t
with level of significance of 0.05 is 1.98 or t
t
78,0.05= 1.98
b. Applying the t- test In applying the t-test formula, the researcher tested the null
hypothesis H
O
of this research that is there is no significant difference in listening achievement between students taught by using video and those
taught without using video. Statistically, the hypothesis can be formulated as H
o
Null Hypothesis :
2 1
. The formula above means that the mean of the scores of the
students taught by using video is not significantly different from the mean of the scores of those taught without using video. While the alternative
hypothesis H
a
of this research is that there is a significant difference in
listening achievement between students taught by using video and those taught without using video. Statistically, the hypothesis can be formulated
as H
a
Alternative Hypothesis :
2 1
. The formula above means that the mean of the scores of the
students taught by using video is significantly higher than the mean of the scores of those taught without using video. Moreover, it is known that if t
o
t-observation is smaller than t
t
t
table
, H
O
is accepted. On the contrary, if t
o
t- observation is higher than t
t
t
table
, H
O
is rejected. The result of t computation shows that t- observation t
o
is 4.99 while t-table t
t
for the degree of freedom of 78 and at the level of significance of 0.05 is 1.98. It can be seen that t
=4.99 is higher than t
t
78,0.05= 1.98 or t t
t,
which means that Alternative Hypothesis H
a
is accepted while Null Hypothesis H
is rejected. Thus, it can be concluded that there is a significant difference in listening achievement between
students taught by using video and those taught without using video. The computation of t-test can be seen in appendix 13.
2. Second Hypothesis
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