g. Determining Standard Error of Different Mean of variable X and vriable Y, the
formula is: SE
Mx – MY
= √
h. Determining t
o
with formula: t
o
=
–
i. Determining t – table in significance level 5 with degree freedom df:
df = N1 + N2 2
G. The statistic Hypothesis
The hypothesis is a statement in quantitative research in which the investigator makes a prediction about the outcome of a relationship among
attributes or characteristic.
5
The statistic hypothesis used in this study was as
follow: H
a
Hypothesis alternative : if t
observed
t
table
, hypothesis alternative is accepted. It means that Peer Tutoring is effective towards
students’ understanding in using Simple Past Tense.
H Null Hypothesis
: if t
observed
t
table
, hypothesis alternative is rejected. It means that
Peer Tutoring is effective towards students’ understanding in using Simple Past Tense.
5
Creswell, op. cit., p.111.
32
CHAPTER IV RESEARCH FINDING
In this part, the writer presents the data that have been collected. The writer divided in to three parts: The description of the data, the Analysis of the
data and the Interpretation of the data.
A. The Description of The Data
The Pre-Test done in both experiment and controlled group before the quasi-experimental study was conducted. There were 20 questions of multiple
choices about simple past tense and the Post-Test after the treatment. Based on the result of the pre-test, the data showed that the mean score of
pre-test in experiment class was 44.16 and the mean score of post-test was 80.83 so that the mean of gained score of experiment class was 36.67. Meanwhile in
controlled class, the mean score of pre-test was 43.75 and the mean score of pos- test was 57.70 so that the mean of gained score in controlled class was 13.95.
Based on the data have been collected from the pre-test, there were only 3 students in experiment class who passed the Minimum Mastery Criterion KKM
and there were only 2 students who passed KKM in controlled class. Meanwhile based on the data have been collected from the post-test, there were 23 students
who passed KKM in experiment class and there were only 6 students who passed KKM
in controlled class. It could be seen in the appendix. From the different score obtained between students in experiment and controlled class, it can be
concluded that Peer Tutoring is effective towards students’ understanding in using
simple past tense.
