about the significant difference between the experimental group and the control group. The results of the tense test were analyzed as follows.
4.5.1. The Result of the Post-test
The post test was given to both the experimental group and the control group on May 19
th
, 2014 after the treatment was given to the experimental group, while the control group was taught by using lecturing method and Q-A. The scores of the post
test were used to investigate whether there was a significant difference between the experimental group and the control group after the treatment. The post test results
were analyzed statistically by using SPSS with independent sample t-test to know whether the mean difference between the experimental group and the control group
was significant or not. The results of the posttest can be seen in the table below:
Table 4.4. The Result of the Post Test
From the table above, the total number of the test takers of the experimental group was 40 students and the control group was 40 students. The mean score of the
post test of the experimental class was 69.51 with standard deviation 17.950. Meanwhile, the mean score of the post test of the control group was 51.86 with
standard deviation 18.766.
Table 4.5 The Output of Independent Sample T-Test of Vocabulary Score
From the table above, the value of significant column of Lavene’s test was 0.527. It was higher than 0.05. Consequently, the row that must be read was the first
row of t-test column. In t-test column, the value of significant 2 tailed was less than 0.05 that was 0.000. It means that there was a statistical difference between the
experimental group and the control group.
4.5.2. The Hypothesis Verification
In this research, the researcher formulated the hypothesis as “There is a
significant effect of using Puzzles on the eighth grade students’ vocabulary
achievement at SMPN 14 Jember in the 20132014 academic year”.
Based on the output of Independent sample t-test by using SPSS program, the value of significant column of Lavene’s test was 0.527 and that was lower than 0.05
confident interval 95. It meant that the variability of the experimental group and the control group was not equal. Consequently, the row that had to be read was the
first row of t-test column table and ignored the second row.
In the t-test column we can see that the value of sig 2-tailed column was 0.000. The value of sig 2-tailed column was lower than 0.05 p0.05. It could be
concluded that there was statistically significant difference between the experimental and the control groups or there was a significant effect between those the
experimental and the control groups.
4.6. Discussion
