The aim of this current research was at revealing whether or not there was a positive influence of Guided Discovery Learning method through the case examples of students' understanding in statistical hypothesis test analysis. It was considered that quantitative research method, with the experimental design using control group design (The Posttest-Only Design with nonequivalent Group), would usefully decide and justify the results. This research was carried out at IAIN Mataram at the students of Islamic Religious Education Department from May to October 2017. In addition, the instrument used to measure students' understanding was the essay problem. Meanwhile, the data analysis technique used a correlated pairs test (t-test) through the one-tail test using independent sample t-test. The t-test analysis revealed that 63% of the total students, in the control class, had a low understanding of statistical hypothesis test. Then, 66% of the total students, in the experimental class, were classified as having a high understanding of statistical hypothesis test analysis. The additional justification also rooted from the result of hypothesis testing. Because to (3,255) was higher than tt ((0,05: 72)=1,990). Then, H0 is accepted and H1 is rejected at the significant level α=0,05. It could be inferred that the discovery lesson learning strategy, through case example, had a positive influence on students' understanding in analyzing statistical hypothesis test.
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