44
order. Wednesday,
November, 18
th
2010
1. Printed leaflets “Cat”
Center, Goen “Duck” Farm, John Dairy
“Cows”, Edi’s “Chickens” Poultry
2. Blackboard
3. Selotip
paper glue 1.
The teacher shows leaflets
that can help students
create descriptive text
easier. 2.
The teacher asks the
students to make a group
consist of 10 persons each.
3. The
teacher asks the students
to make the descriptive
text in correct order.
4. Some
of the students are asked
to apply the leaflets in
front of the class as the model.
4.1.4 Post-test Finding
The post‐test was conducted on Wednesday, November 24
th
, 2010 for both groups, class
VIIIA as the control group and class VIIIB as the experimental group. The purpose of this
test was to know the students’ ability in writing descriptive text after the treatment
were given. The result of the post‐test can be seen in Appendices 12 and 14.
45
From those scores, the average scores of the control and the experimental
groups were analyzed. The post‐test average score of the control group was 74.68 and
the experimental group was 78.50. It meant that the achievement of the experimental
group was higher than the control group. It was proven by the t‐test formula.
The number of subjects in this study for the control and the experimental groups were 80
with the degree of freedom df = 78, that was Nx + Ny − 2 = 78. At the 5 0.05
alpha level of significance, t‐value that was obtained was 4.40 and t‐table was 2.00, so
the t‐value is higher than t‐table. The result showed that there was a significant
difference in achievement between the control and experimental groups on the post‐
test. The computation can be seen in appendix 16. Below is the chart of the students’
average score which covers five components of writing.
Chart 4.2
The Average Score of the Post‐test
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4.1.5 Level of Students’ Achievement
The data were obtained from the students’ achievement of writing descriptive text. The
following are the charts of the students’ average scores which cover five components of
writing on the control and the experimental groups.
Chart 4.3
The Average Score of the Control Group
Chart 4.4
The Average Score of the Experimental Group
47
From the charts above, the average scores of each component of writing on the two
groups were improved on the post‐test. From those result, the average scores of the
two groups were analyzed. In details, it can be seen on the chart below:
Chart 4.5
The Average Score between the Control and Experimental
Groups
48
From the chart above, the different average score between the control and
experimental groups was shown. On the control group, the average score of the pre‐test
was 57.15 and the post‐test 74.68. From those scores, the different average score
between the pre‐test and the post‐test on the control group was 17.53. While, on the
experimental group, the average score of the pre‐test was 57.60 and the post‐test was
78.50. The different average score between those tests was 20.90. It meant that the
different average score on the experimental group was higher than in the control group.
It could be concluded that there was good improvement of the experimental group’s
achievement after they received the treatment using leaflets. It was also proven by the
t ‐test formula. The result showed that there was a significant difference between the
control and experimental groups on their writing product. The computation can be seen
in Appendix 20.
4.2 Normality and Homogeneity
