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Instruments of the Research Validity and Reliability

Figure 3.1. The Example Graphic Line of Problem Solving Line 1 indicated that problem solving had a good effect or positive effect in teaching speaking. Line 2 indicated that problem solving that was implemented by using problem solving had a negative effect. And then line 3 indicated that there was no significant difference on students’ speaking ability before and after the application of problem solving.

3.8 Testing the Hypothesis

Hypothesis of this research was: H 1 = T value T table H = T value T table H 1 : There is a significant difference of students’ speaking ability after being taught through problem solving. H : There is no significant difference of students’ speaking ability after being taught through problem solving. 1 2 3 4 5 6 7 T1 T2 T3 T4 T5 T6 1 2 3 This hyphotesis was statistically analyzed by comparing the mean of both pre test and post test using excel manually, Pair Sample T-Test of SPSS 16 and then make a graph based on the mean score of the test.

V. CONCLUSIONS AND SUGGESTIONS

This chapter draws about the conclusions of this research and the reseacher’s suggestions.

5.1 Conclusions

To answer the formulation of the problem and referring to the results the researcher draws the following conclusions: 1. There is a significant difference of students’ speaking ability after being taught through problem solving. It means that problem solving can increase students speaking ability. It can be seen from the finding of the research. The total gain score of students’ speaking achievement from pre- test to post-test is; students’ mean score pre-test 1 is 62.3, pre-test 2 is 63.1 gain of , pre-test 3 is 64.2. Meanwhile, the result of mean score from post- test 1 is 71, post-test 2 is 73.4 and post-test 3 is 76.8. The reseacher also using pair sample of SPSS. The result is 1 st pair 26.187 t-value 2. 048 t-table , 2 nd pair 22.079 t-value 2. 048 t-table, 3 rd pair 43.847 t- value 2. 048 t-table means that there are significant differences of students’ speaking ability after being taught through problem solving Therefore, the first hypothesis is accepted.

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