experimental class, the amount of the students in controlled group consist of 17 students.
The most frequency appearance on distribution was the score between 70- 73 with the numbers of absolute frequency 5 or 29.41 in relative frequency.
While, the least appearance was interval 66-69, the frequency is 1 or 5.88 in relative frequency. Hence, the total frequency which was formulated into relative
frequency was 100.
4. The Frequency Distribution of Students’ Post-test Scores
a. Experimental Class
Table 4.5 The Frequency Distribution of Post-test Scores of the Experimental Class
NO. INTERVAL LOW CLASS
BOUNDARY FREQUENCY
ABSOLUTE RELATIVE 1.
72-75 71,5
10 58,82
2. 76-79
75,5 3
17,65 3.
80-83 79,5
1 5,88
4. 84-87
83,5 2
11,76 5.
88-91 87,5
1 5,88
TOTAL 17
100
Figure 4.3. Diagram of Frequency Distribution of Post-Test Scores of the Experimental Class
2 4
6 8
10
72-75 76-79 80-83 84-87 88-91
ABSOLUTE FREQUENCY
ABSOLUTE FREQUENCY
The distribution form in experimental class presented the length interval P for the pre-test of the experimental class was 4. Then, the numbers of class
interval K were 5. The diagram also presented the lowest score that was 72 and the highest one was 91. The total numbers of students were 17. The most
frequency appearance on the frequency distributed was the score between 72-75 with the number of absolute frequency 10 or 58.82. However, the two least
frequency apperance on the frequency distributed were the score between 80-83 and 88-91 with frequency 1 and 1.
b. Controlled Class
Table 4.6 The Frequency Distribution of Post-test Score of the Controlled Class
NO. INTERVAL LOW CLASS
BOUNDARY FREQUENCY
ABSOLUTE RELATIVE 1.
65-68 64.5
3 17.65
2. 69-72
68.5 5
29.41 3.
73-76 72.5
4 23.53
4. 77-80
76.5 3
17.65 5.
81-84 80.5
1 5.88
6. 85-88
84.5 1
5.88 TOTAL
17 100
Figure 4.4. Diagram of Frequency Distribution of Post-Test Scores of the Controlled Class
2 4
6
65-68 69-72 73-76 77-80 81-84 85-88
ABSOLUTE FREQUENCY
ABSOLUTE FREQUENCY
From the table and the diagram above, it presented some information. The numbers of the class interval K were 6 and the length of the interval I was 4.
Then, the lowest score was 65 and the highest one was 88. Its diagram is taken from 17 students‟ scores.
The most frequency appearance on distribution was the score between 69- 72 with the numbers of absolute frequency 5 or 29.41 in relative frequency.
While, the least appearance were interval 81-84 and 85-88, the frequencies were 1 and 1 with relative frequency 5.88.
5. Normality Test
In gaining normaility test, the writer used SPSS software. The result of normality test was presented in table 4.7 and 4.8. Some steps in gaining normaility
test by using SPSS as follows
1
: a
Open the data b
Select analyze c
Select descriptive statistic d
Choose the variable will be analyzed and put into variable colomn e
Select option f
Check list skewness and kurtosis g
Select continue h
Select Ok a.
Normality Test of Pre-test Table 4.7. The Result of Normality Test of the Pre-test
Descriptive Statistics
Class N
Skewness Kurtosis
Statistic Statistic Std. Error Statistic Std. Error Experimental
17 -.140
.550 .953
1.063 Controlled
17 -.581
.550 -.829
1.063
1
Budi Susetyo, Statistika Untuk Analisis Data Penelitian, Bandung: Refika Aditama, 2010, p.272.
