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3.10 Hypothesis Testing
To demonstrate if the hypothesis of this research is sustained, hypothesis test is
performed on the data by using One Sample Test. The hypothesis testing which shows that model composition guided writing can
increase students‟ descriptive text writing ability approved at the significant level of 0,05 in which
α 0,05 Setiyadi, 2006:97. The hypothesis was analyzed by using statistical computerization SPSS 15.0, the formula is:
T = Where:
T = t value
= sample average Parameter value
Sd = standard deviation n = number of students
Hatch and Farhady, 1982:104
The criteria are:
Ha alternative hypothesis is accepted if alpha level is lower than 0.05 α0.05
Ho null hypothesis is accepted if alpha level is higher than 0.05 α0.05.
Since the hypothesis of the research is model composition guided writing can
increase st udents‟ descriptive text writing ability, this hypothesis will be accepted
if alpha level is lower than 0.05.
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IV. RESULT AND DISCUSSIONS 4.1
Result of Data Analysis
In order to figure out whether the objective of this present research could be
achieved or not, the writer analyzed test result of the pretest and the post test that is presented in this chapter.
4.1.1 Students’ Writing Ability before the Treatment in Experimental Class
At the first meeting, the researcher conducted pre test in order to find out the
previous ability of the students in writing a descriptive text about place. The pretest was administered on February 2
nd
2010. The scores of the five aspects of writing tested in the pre test are presented in the following table
Table 1. Average of the Students’ Scores of the Pretest in Experimental Class
Pretest The Evaluated Components of Writing
Total Content
Organization Vocabulary
Grammar Mechanic
R1 R2
R1 R2
R1 R2
R1 R2
R1 R2
10.9 10 11.1
10.6 10.6
10 10.9 8.8
11.1 8.8
Average 10.45
10.85 10.3
9.85 9.95
51.4
From the table above we can see the scores of five components of writing tested in the pre test in the experimental class. They are content 10.45, organization
10.85, vocabulary 10.3, grammar 9.85, and mechanic 9.95. The table shows us the ability of the students before they got the treatment. The mean of the pre
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