Statistical Hypotheses The Technique of Data Analysis

and post-test in experimental class is 9.70 , with the highest student’s gained score is 16 and the lowest student’s gained score is -7.

2. The Data of Controlled Class

Table 4.2 The Students’ Scores of Controlled Class Writing Descriptive Text without Using Dictogloss Technique No. Pre-Test Post-Test Gained Score 1 54 64 10 2 63 60 3 3 66 65 -1 4 57 64 7 5 60 69 9 6 60 71 11 7 60 65 5 8 65 72 7 9 61 70 9 10 65 67 2 11 65 58 -7 12 56 69 13 13 60 65 5 14 71 69 -2 15 62 54 -8 16 64 60 -4 17 58 61 3 18 55 58 3 19 65 71 6 20 60 64 4 Total 1227 1296 75 Average 61.35 64.80 3.75 Based on the data from controlled class, the data shows that the highest score of pre-test in the experimental class is 71 and the lowest score of pre-test is 54. Besides that, the mean score of pre-test in experimental class is 61.35. From the frequency distribution table of pre-test result from experimental class, it can be seen that from 20 students in controlled class, there are 5 students had score between 54 – 59, 13 student had score between 60 – 65 and 1 student had score between 66 – 70 and 1 student had score 71 It also shows that the mean score of post-test in controlled class is 64.80 with 72 as the highest score and 54 as the lowest score. Then, the frequency distribution table of post-test result also shows that there are 1 student had score between 50 – 55, 4 students had score between 55 – 60, 7 students had score between 61 – 65, 5 students had score between 66 – 70 and 3 students had score 71 - 75 In addition, the calculation also shows that the total of gained score of pre-test and post-test in controlled class is 75 and the mean of gained score of pre-test and post-test in controlled class is 3.75 , with the highest student’s gained score is 11 and the lowest student’s gained score is -8.

B. Data Analysis

1. Normality Test of the Data

The result of normality test on both experimental and controlled class’ pre- test and post-test was gained from Lilliefors test using SPSS 22. This test is used to determine whether the distribution of the data from the sample is normal. If the normality is more than the level of significance α 0.05, scores will be normally distributed. The following table was the results of normality test of the experimental and controlled class’ pre-test: Table 4.3 Normality Pre-test Results between Experimental and Controlled Class Tests of Normality teknik dictogloss Kolmogorov-Smirnov a Shapiro-Wilk Statistic Df Sig. Statistic df Sig. Nilaites Experimental ,161 20 ,184 ,960 20 ,535 Controlled ,125 20 ,200 ,964 20 ,631 . This is a lower bound of the true significance. a. Lilliefors Significance Correction