i. Determine the degree of freedom
��
with formula:
�� = �
1
+ �
2
– 2
G. Statistical Hypotheses
To prove the hypothesis, the data obtains from experimental class and control classes were calculated by using t
test
formula with assumption as follows: H
: �
�
= �
�
H
1
: �
�
�
�
The criteria for the hypothesis testing are: H
is accepted if t ≤ t
1- ɑ
, the t
1-1½ ɑ
price is obtained from t distribution table, on the other hand, H
is rejected on the any other price. To prove the hypothesis, the obtained data from experimental class and
control class were calculated by using t
test
formula with assumption as follows: a. If t
≤ t
table
, in significant degree of 1, the Null Hypothesis Ho is accepted and the Hypothesis Alternative Ha is rejected. It means that there is no
significant effect of Jigsaw technique on students’ reading exposition text ability.
b. If t ≥ t
table
, in significant degree of 1, the Null Hypothesis Ho is rejected and the Hypothesis Alternative Ha is accepted. It means that there is a
significant effect of Jigsaw technique on students’ reading exposition text ability.
30
CHAPTER IV RESEARCH FINDINGS AND INTERPRETATION
A. Description of the Data
The data from students’ pre-test and post-test was collected in this research as the main instrument. The pre-test was administered before the treatment is
given to the experimental class and control class; meanwhile the post-test was administered after the treatment is given to the experimental class and control
class. The data that can be used in this research is 39 students’ pre-test and post- test scores from experimental class and 39 students’ pre-test and post-test scores
from control class. It was due to one experimental class student’s absence in pre- test and one control class student’s absence in post-test. Table 4.1, 4.2, and 4.3
present the experimental class students’ pre-test score, post-test score, and gained score. Here are the descriptions:
1. Pre-test Score
In this part, the data of the pre-test score of experimental class and control class is provided. These are the description:
Table 4.1 Pre-test Score of Experimental Class and Control Class
Experimental Class Control Class
No Student
Score No
Students Score
1 1
85 1
1 55
2 2
75 2
2 80
3 3
70 3
3 80
4 4
50 4
4 70
5 5
80 5
5 75
6 6
75 6
6 80
7 7
85 7
7 65
8 8
60 8
8 80
9 9
75 9
9 75
10 10
80 10
10 65
11 11
85 11
11 70
12 12
75 12
12 70
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