4. 68-72
67.5 72.5
4 13.33
5. 73-77
72.5 77.5
7 23.33
6. 78-82
77.5 82.5
3 10
∑ 30
100
Figure 4.1 Diagram of frequency distribution of the pre-test score of the experimental class
The data of the pre-test score of the experimental class presented into frequency distribution table and diagram form. The classification of the data
was made based on the length of interval P, number of classes K, and range R. The table 4.4 shows that the length of the interval was 5 and the numbers
of class interval were 6. The up class boundary of the first class interval was 57.5 and the up class boundary of the last interval was 82.5. The total numbers
of students were 30. Moreover, the most frequency appearance on the frequency distributed was the score between 63-67 and 73-77 with the number
of absolute frequency 7 and the relative frequency 23.33 . In addition, the least appearance of score was on interval 78-82 with the number of absolute
1 2
3 4
5 6
7
53-57 58-62
63-67 68-72
73-77 78-82
Class Interval
Absolute Frequency
frequency 3 and relative frequency 10. The whole description of statistical calculation can be seen on the appendix.
b. Post-test score of the experimental class
Table 4.5 The Frequency Distribution of the post-test of Experimental Class
No. Interval Low Class
Boundary Up Class
Boundary Frequency
Absolute Relative
1. 67-70
66.5 70.5
2 6.66
2. 71-74
70.5 74.5
2 6.66
3 75-78
74.5 78.5
8 26.66
4. 79-82
78.5 82.5
6 20
5. 83-86
82.5 86.5
5 16.66
6. 87-90
86.5 90.5
7 23.33
∑ 30
100
1 2
3 4
5 6
7 8
67-70 71-74
75-78 79-82
83-86 87-90
Class Interval
Absolute Frequency
Figure 4.2 Diagram of frequency distribution of the post-test score of the experimental class
Table 4.5 shows that the numbers of the class interval was 6 and the length of interval was 4. The low class boundary of the first class interval was
66.5 and the low class boundary from last class was 86.5. The total numbers of absolute frequency were 30. The table also shows that the most frequency
appearance on the frequency distributed was the score in interval 75-78 with the absolute frequency 8 and relative frequency 26.66. Moreover, the least
appearance of score was the score between interval 67-70 and 71-74 with the absolute frequency 2 and relative frequency 6.66. On the other hand, the
upclass boundary on the first interval was 70.5 and the up class boundary of the last interval was 90.5. The whole description of statistical calculation can be
seen on the appendix.
5. The Frequency Distribution of the Controlled Class
a. Pre-test score of the controlled class
Table 4.6 The Frequency Distribution of the pre-test of Controlled Class
No. Interval
Low Class Boundary
Up Class Boundary
Frequency Absolute
Relative 1.
57-60 56.5
60.5 7
23.33 2.
61-64 60.5
64.5 2
6.66 3
65-68 64.5
68.5 5
16.66 4.
69-72 68.5
72.5 3
10 5.
73-76 72.5
76.5 6
20 6.
77-80 76.5
80.5 7
23.33
