RESEARCH POPULATION AND SAMPLE
52 90, which is considered as small number thus using non-parametric test is more
preferable. In analyzing the data, initial step taken by the researcher was determining
the distribution of the data, check the data whether it was normally distributed or not. To find out the data normality, the writer operated descriptive analysis test
with IBM SPSS. When the p-value 0.05 it means that the data follows a normal distribution, otherwise when the p-value 0.05 the data does not follow a normal
distribution. After running statistical data analysis, it turned out that obtained p- value was 0.05. Obtained p-value showed that the data did not follow normal
distribution. Consequently, further statistical data required Kruskal-Wallis H test to analyze the obtained data of this study. Subsequently, a test of homogeneity
was operated to observe the homogeneity of data from the three groups of population samples.
To accommodate the answer of the first research question, the writer needed to investigate means of acquired score of each group of learners.
Therefore, the developmental pattern could be observed by interpreting the investigation result. To answer the second research question about the significant
difference on the development of the acquisition of grammatical aspects by three groups of learners the writer operated Kruskal-Wallis H test. Further, the result of
that statistical data analysis was interpreted to accommodate the answer for the second research question. Subsequently, the answer for the third research question
could be obtained by observing the means value of each grammatical aspect score. Grammatical aspect obtained the lowest score was considered as the most
problematic aspect for the learners.
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