b. Determining Mean of variable Y with formula:
∑
c. Determining deviations standard variable X with formula:
√ ∑
∑
d. Determining deviations standard variable Y with formula:
√ ∑
∑
e. Determining standard errors mean variable X with formula:
√
f. Determining standard errors mean variable Y with formula:
√
g. Determining the differences of mean variable X and mean variable Y with formula:
√
h. Determining with formula:
i. Determining degree of freedom df with formula:
df = degree of freedom f1 = total of students of experiment class
f2 = total of students of control class
F. The Testing of Hypotheses
The writer proposes hypotheses toward this research as follow: 1 The Null Hypothesis
there is no significant difference in student’s vocabulary achievement in learning vocabulary by using card
game techniques. The Null Hypothesis is accepted if t-test
t-table and the alternative hypothesis is rejected.
2 The alternative hypothesis , there is significant difference in
students vocabulary achievement by using card game technique. The alternative hypothesis
is accepted if t-test t-table and the
Null Hypothesis is rejected.
26
CHAPTER IV RESEARCH FINDING and INTERPRETATION
A. The Description of Data
To know the result of this experiment, the writer collected the students’ score in the pre-test and post-test from the two classes. The variable
X represented the result of pre-test and post test from the experiment class and the variable Y is the result of pre-test and post-test in the controlled class.
1. The Data of Experiment Class
Based on the data gather from the pre-test and post-test in the experiment class, it could be seen that from 40 students in the experiment
class, the mean of the pre-test is 73.2. The data shows that the lowest score achieved by students is 48 and the highest score in pre-test is 78. After
giving treatment by using card games, the writer conducted a post-test to know the effectiveness of using card games in teaching vocabulary. The
highest score in the post-test is 96 achieved by four students and the lowest score is 78 and the mean of the post-test is 87.6. So, the writer calculates the
mean of gained score from the experiment class is 14.4. The data shows student’s achievement score after gained the treatment was increased.
Further details about the students score will be presented on the appendix 12.
2. The Data of Control Class
According to the data from students’ pre-test and post-test in the
control class, the mean of the pre-test is 72.35. The data shows that the lowest score achieved by students is 48 and the highest score in pre-test is
78, it was the same with the score achieved by students’ in the experiment
