difference between the two groups; they were the experimental and the control groups. The results of the test can be seen in Appendix M.
4.5.1 The Analysis of the Post Test
The reading post test was administered to both the experimental group and the control group on January 19
th
, 2015 after the students had been given the treatment. The scores of the post-test were used to investigate whether there was significance
difference between the experimental and the control groups after the treatment. The post test results were analysed statistically by using SPSS Statistical Package for the
Social Sciences especially with Independent sample t-test formula to know whether the mean difference between the experimental group and the control group was
significant or not. This researcher used 95 confidence interval of the difference. The output of the post test was analyzed by using independent t-test of SPSS which
can be seen in the table below.
Table 4.4 the Output of Group Statistics of Post Test Group Statistics
Group Statistics
KELAS N
Mean Std. Deviation
Std. Error Mean
NILAI EXPERIMENTAL 36
78.9444 7.07892
1.17982 CONTROL
34 73.8235
6.51093 1.11661
From the table above, the total number of the test takers of the experimental class was 36 students and the control class was 34 students. The mean score of the
reading test of the experimental class was 78.9444 with standard deviation 7.07892 and the mean score of the reading test of the control class was 73.8235 with standard
deviation 6.51093
Table 4.5 The Output of Independent Sample T-Test of Post Test
Independent Samples Test
Levenes Test for Equality of
Variances t-test for Equality of Means
95 Confidence Interval of the Difference
F Sig.
t df
Sig. 2-
tailed Mean
Differen ce
Std. Error Difference
Lower Upper
NILAI Equal variances
assumed .233
.631 3.145 68
.002 5.12092 1.62837
1.87155 8.37028
Equal variances
not assumed
3.152 67.955 .002 5.12092
1.62444 1.87936
8.36247
From the table above, the value of significant column of Lavene’s test for equality of variances was 0.631 and it was higher 0.05. Consequently, the row that
must be read was the first row of t-test column. In independent sample t-test column, the value of significant column 2-tailed was 0.002, and it was lower than 0.05. It
means that there was a statistical difference between the experimental and the control groups.
4.5.2 The Hypothesis Verification
