Data Analysis Method RESEARCH METHOD

3.6 Data Analysis Method

After conducting the research and collecting the data, the data then was analyzed statistically by using t- test formula in order to find whether or not there was a significant effect of using clustering as a technique on the eighth grade students’ writing recount text achievement at SMP Negeri 1 Siliragung. Moore 1983:281 stated, “T-test is used to determine whether there is statistical significance between the means of two group. It is used with interval and ratio scales variables where the populations are normally distributed and have homogeneity of variances”. Independent sample t- test was used in this research. Setyadi 2006:168 stated that an independent sample t- test is used because the researcher wants to compare the means of two independent classes. Before the data analyzed by using t-test, the data was assumed normaly distributed because the sample sizes were more than 30 Moore, 1983:281. Then, Moore added “Violations of the assumption of homogeneity of variances also have little effect on t-test value when sample sizes are equal. The formula of t- test is as follow:                         Nb Na Nb Na Y X Mb Ma t test 1 1 2 2 2 Ma : Mean of the experimental group Mb : Mean of the control group X : Individual score deviation of the control group Y : Individual score deviation of the control group Na : The number of subjects in the experimental group Nb : The number of subjects in the control group Adopted from Arikunto, 2010: 354 After analyzing the data, the result was consulted to the t-table of 5 significance level to know whether or not the result was significant. If the result of the t- test was higher than that of the t-table, it meant the null hypothesis was rejected and the alternate hypothesis was acceptable. So, the result of this research was considered significant. Conversely, if the result of the t- test was lower than that of the t-table, it meant the null hypothesis was accepted and the alternate hypothesis was rejected. So the result of this research was considered not significant.

CHAPTER 5 CONCLUSION AND SUGGESTIONS