Table 4.4 Table of Data Description of Post-test Result of Controlled Class
Statistics
Control N
Valid 20
Missing 20
Mean 58.35
Median 62.00
Mode 38
Range 41
Minimum 38
Maximum 79
Sum 1167
From the table above, the data of class X.1 as the controlled class was 20 students. The total score of this class was 1167 where it was lower than the
experimental class. The mean score was 58.35 and the median score was 41. The highest score in post-test of controlled class was 79 and the lowest score was 38.
3. Normality Test
The result of normality test on both experimental and controlled class’ pre-test and post-test was gained from Lilliefors test using SPSS 22. The test is determined
if 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 steps are: Click Analyze Descriptive Statistics Explore Fill variable on
dependent list and fill another variable on factor box Click Plots checklist Normality Plots with Tests Continue Ok.
The following was the results of normality test of the experimental and controlled class’ pre-test:
Table 4.5 Normality Pre-test Results between Experimental and Controlled Class
Tests of Normality
Kelas Kolmogorov-Smirnov
a
Shapiro-Wilk Statistic
df Sig.
Statistic df
Sig. Pretest
Experiment .170
20 .134
.907 20
.055 Control
.174 20
.115 .908
20 .059
a. Lilliefors Significance Correction
The result of the normality test above showed that the significance of the experimental class were 0.134 and 0.055. The controlled were 0.115 and 0.059. It
means that the significance of both experimental and controlled class was higher than the degree of significance 5
α = 0.05. Therefore, it could be concluded that the data of both experimental and the controlled class’ pre-test was
normally distributed. The following was the results of normality test of the experimental and
controlled class’ post-test:
Table 4.6 Normality Post-test Results between Experimental and Controlled Class
Tests of Normality
Kelas Kolmogorov-Smirnov
a
Shapiro-Wilk Statistic
df Sig.
Statistic df
Sig. Posttest
Experiment .155
20 .200
.918 20
.092 Control
.167 20
.146 .944
20 .281
. This is a lower bound of the true significance. a. Lilliefors Significance Correction
The result of the normality test above showed that the significance of the experimental class were 0.200 and 0.092. The controlled class were 0.146 and
0.281. It means that the significance of both the experimental and controlled class was higher than the degree of significance 5
α = 0.05. In addition, it could
be proved that the data of both the experimental and controlled class’ post-test was normally distributed.
4. Homogeneity Test
