The Descriptive Statistic of Pre-test Result
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experimental group was quite varied. For the complete scores of experimental group’s post-test, please refer to APPENDIX 11.
Figure 4.4. The Distribution of Post-test Result of Experimental Group
The graphic shows positively skewed distribution of the post-test result, as the distribution was concentrated on the left side in the figure. As seen above, the
highest frequency was 70. As the control group functioned as comparison, no treatment was given.
Table 4.5. and figure 4.5. show the descriptive statistic of pre-tests of control group.
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Table 4.5. The Distribution Table of Post-test Result of Control Group
Posttest
Frequency Valid
47.00
2
50.00
4
53.00
6
56.00
7
59.00
2
63.00
5
65.00
1
66.00
7
69.00
2
72.00
3
75.00
1
78.00
4
81.00
1
84.00
2
88.00
1
91.00
2
94.00
1
97.00
1
Total
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The information in table 4.5. presents the distribution of the post test results of the control group. There was bimodal : 56 and 66. The mean score for
the post-test was 65.67, and the standard deviation was 13.08. The difference from the highest to lowest score was 50 points, almost five times standard deviation,
which ranges from 47 to 97. This reflects that the score distribution of the post test of the control group was quite varied. For the complete score of control group’s
post-test, please refer to APPENDIX 12.
Statistics
Po sttest N
Valid
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Missing Mean
65.6731
Std. Deviat ion
13.08602
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Figure 4.5. The Distribution of Post-test Result of Control Group
Figure 4.5. shows positively skewed distribution of the post-test results, as the distribution was concentrated on the left side in the figure. As seen above, the
highest frequency belonged to the score of 50 and 70. The difference found in the mean score of the pre-tests and post-tests of
the experimental and control group did not automatically call for significant difference. Therefore, to ensure that the difference was significant, the researcher
performed a t-test, that will be discussed in the next topic.
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