Table 20: Result of the Homogeneity Test in Pre-Test Levene Statistic
df1 df2
Sig. Interpretation
Writing Ability
2,073 1
62 0.155
Homogeneous
Table 20 shows that the value of p Sig. of the pre-test 0.155 is greater than 0.05. It means that the sample variance was homogenous.
Table 21: Result of Homogeneity Test in Post-Test Levene Statistic
df1 df2
Sig. Interpretation
Writing Ability
0.340 1
62 0.562
Homogeneous
Table 21 shows that the value of p Sig. of the post-test 0,562 is greater than 0.05. It means that the sample variance was homogenous.
2. Hypothesis Testing
The hypothesis testing was aimed at revealing whether there is a significant difference in writing ability between students who are taught by
inquiry-based learning strategy and those who are not taught by using inquiry- based learning strategy. Firstly, the hypothesis must be changed to the null
hypothesis Ho before the hypothesis was rejected or accepted. The hypothesis testing can be seen from the following explanation:
a. Null Hypothesis Ho: There is no significant difference in writing ability between students who are taught using inquiry-based learning strategy and
those who are not taught by using inquiry-based learning. b. Alternative Hypothesis Ha: There is significant difference in writing
ability between students who are taught using inquiry-based learning
strategy and those who are not taught by using inquiry-based learning strategy.
In this research, the researcher analyzed the data by using SPSS 13.00 computer program for windows. In testing the hypothesis, ANCOVA
Analysis of Covariance was used since this research involved the scores of both the pre-test and post-test and the mean scores of the pre-test of both
classes were different. In hypothesis testing, if the value of the level of significance is lower
than 0.05, the hypothesis is accepted. The result of the ANCOVA test is presented in Table 22. The complete print out of the analysis can be seen in
Appendix C.
Table 22: The Result of ANCOVA
Sources Type III Sum
of Squares df
Mean Squares F
Sig.
Corrected Model Intercept
GROUP PRETEST
Error Total
Corrected Total 5223.
16 1
1 15
47 64
63 326.497
185726.406 2550.582
74.663 46.662
6.997 3980.214
54.660 1.600
.000 .000
.000 .110
From the result shown in Table 22, it can be identified that the level of significance of pre-test is 0.110 which is greater than 0.05. It means that there
is no significant difference on students’ writing ability seen from the result of the pre-test. Meanwhile, the level of significance of group that refers to post-
test both of experimental and control class is 0.000. Since the level of significance value is less than 0.05, i.e. 0.000 0.05, the null hypothesis Ho
