1. Pre- Testing Analysis
Before the hypothesis testing was applied, pre-test analysis was done first. Pre-testing analysis consisted of two tests, including the normality and
homogeneity tests. The normality test was employed to test whether the data of the scores show the normal distribution, and the homogeneity test was used to test
whether the sample’s variance is homogeneous or not. The results are presented as follows.
a. Normality Test
The test of normality was aimed at finding out whether the data of the scores show a normal distribution. In this case, the Kolmogorov- Smirnov test was
employed. Theoretically, if the value of p is greater than 0.05, the data are said to be normal. If it is below 0.05, the data significantly deviate from a normal
distribution. Table 19 presents the result of the normality test of students’ pre-test and pos-test. Meanwhile, the complete computation is enclosed in Appendix C.
Table 19: The Normality Test of the Students’ Writing Test in the Pre-Test and Post-Test for both Experimental and Control Class
Variables P value
α Statement
Pre – Test of Experimental Class 0.743
0.05 Test distribution is normal Post – Test of Experimental Class
0.558 0.05 Test distribution is normal
Pre – Test of Control Class 0.180
0.05 Test distribution is normal Post – Test of Control Class
0.330 0.05 Test distribution is normal
Based on Table 19, the results are presented as follows: 1 The p value or the pre-test for the experimental group 0.743 was greater
than α 0.05. It means that the data of the pre-test of the experimental group
had a normal distribution.
2 The p value or the post-test for the experimental group 0.558 was greater than
α 0.05. It means that the data of the post-test of the experimental group had a normal distribution.
3 The p value or the pre-test for the control group 0.180 was greater than α
0.05. It means that the data of the pre-test of the control group had a normal distribution.
4 The p value or the post-test for the control group 0.330 was greater than α
0.05. It means that the data of the post-test of the control group had a normal distribution.
Briefly, p value of pre-test and post-test in experimental and control class were greater than the significant level of 0.05. It means that the data distribution
of students’ writing ability had a normal distribution.
b. Homogeneity Test
The homogeneity test was used to find out whether the sample variance is homogeneous or not. In this case, the Levene-Test of ONE WAY ANOVA was
employed on the data of pre-test and post-test. The relationship can be considered homogeneous if the significant value is higher than level of significance of 0.05.
The homogeneity test was done in writing ability before and after the treatment pre-test and post-test. It used SPSS 13.00 computer program for
windows, the results are shown in Table 20. The complete computation is enclosed in Appendix C.
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