a. The Data of the Pre-test Scores of the Control Class
Based on the result of statistical calculation by using SPSS 13.00 for windows computer program, the mean score was 58.10 with the standard
deviation 7.45. The maximum score was 72.50 and the minimum score was 40.00. The statistical data can be seen in Table 14.
Table 14: Descriptive Analysis of the Control Class in the Pre-test N
Mean Std.Deviation
Minimum Maximum
Pretest
32 57.10
7.45 40.00
72.50
Meanwhile, the frequency distribution of the pre-test score on the control group is presented in Table 15.
Table 15: Frequency Distribution of the Pre-test score on Students’ Writing Ability of the Control Class.
No Interval
f Percent
Cumulative Percent
Categorization
1. 87.5 – 99.9
Excellent 2.
75.0 – 87.4 Very Good
3. 62.5 – 74.9
12 37.5
37.5 Good
4. 50.0 – 62.4
16 50.0
87.5 Fair
5. 36.5 – 49.9
4 12.5
100.0 Poor
6. 25.0 – 37.4
100.0 Very Poor
Table 15 shows that there were no students classified into very good and excellent. There were 4 students 12.5 in poor category, 16 students 50 in
fair category and 12 students 37.5. in good category. There were 20 students 62.5 achieved score below ideal mean 62.5 in poor to fair category. It can be
concluded that most students belong to poor category on the pre-test or before they were given treatment by using inquiry based-learning strategy.
b. The Data of the Post-test Scores of the Control Class
Based on the result of statistical calculating by using SPSS 13.00 for windows computer program, the mean score was 66.09 with the standard
deviation 7.15. The maximum score for the post-test of the experimental group was 85.00 and the minimum score was 50.00. The statistical data can be seen in
Table 16 and the data analysis is in Appendix C.
Table 16: Descriptive Analysis of the Post-test of the Control Class N
Mean Std.Deviation
Minimum Maximum
Post-test
32 66.09
7.15 50.00
85.00
Meanwhile, the frequency distribution of the post-test score on the experimental group is presented in Table 17.
Table 17: Frequency Distribution of the Post-test score on Students’ Writing Ability of the Control Class
No Interval
f Percent
Cumulative Percent
Categorization
1. 87.5 – 99.9
Excellent 2.
75.0 – 87.4 4
12.5 12.5
Very Good 3.
62.5 – 74.9 19
59.4 71.9
Good 4.
50.0 – 62.4 9
28.1 100.0
Fair 5.
36.5 – 49.9 100.0
Poor 6.
25.0 – 37.4 100.0
Very Poor
Table 17 shows that there were no students classified into excellent, poor and very poor categories. There were 9 students 28.1 in fair category, 19
students 59.4 in good category, and 4 students in very good category 12.5 on the post-test or after they were given treatment using inquiry based-learning
strategy.
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