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Dependent t-test on the Experimental Group Score Dependent t-test on the Control Group Score

Hafidh Indrawan, 2013 The Use Of Audio Visual Aids In Improving Students’ Vocabulary Mastery In Writing Descriptive Texts Universitas pendidikan indonesia | repository.upi.edu | perpustakaan.upi.edu

3.5.3.3.3.1 Dependent t-test on the Experimental Group Score

The dependent t-test on the experimental group was used to find out whether there was significance different or not between pre-test and post-test after the group had experienced the treatment of the use of audio visual aids in this study. The dependent t-test computation used SPSS v.17.0 in calculated the data. The significance level used was at 0,05 two-tailed test of significance. In addition, the hypothesis to test is as follow: Ho = There is no significant different between pre-test and post-test after treatment. H a = There is significant different between pre-test and post-test after treatment. The testing criterions are as follow: Ho is not rejected if -t crit ≤ -t obt or t crit ≥ t obt Ho is rejected if -t obt -t crit or t obt t crit And Ho is not rejected if significant 0,05 Ho is rejected if significant 0,05 Priyatno, 2010: 41

3.5.3.3.3.2 Dependent t-test on the Control Group Score

Hafidh Indrawan, 2013 The Use Of Audio Visual Aids In Improving Students’ Vocabulary Mastery In Writing Descriptive Texts Universitas pendidikan indonesia | repository.upi.edu | perpustakaan.upi.edu The dependent t-test on the control group was used to find out whether there was significance different or not between pre-test and post-test after the group had experienced the treatment of the use of text alone in this study. As in the experimental group, the dependent t-test computation on control group was used SPSS v.17.0 too in calculated the data. The significance level used was at 0,05 two-tailed test of significance. Moreover, the hypothesis to test is as follow: Ho=There is no significant different between pre-test and post-test after treatment. H a =There is significant different between pre-test and post-test after treatment. The testing criterions are as follow: Ho is not rejected if -t crit ≤ -t obt or t crit ≥ t obt Ho is rejected if -t obt -t crit or t obt t crit And Ho is not rejected if significant 0,05 Ho is rejected if significant 0,05 Priyatno, 2010: 41

3.5.3.4 Calculation of the Effect Size

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