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
Figure 4.3 Diagram of frequency distribution of the pre-test score of the controlled class
Table 4.6 shows that the numbers of the class interval were 6 and the length of the interval was 4. While the lowest score in the class interval was 57
and the highest score was 80. The total numbers of absolute frequency were 30. While the highest class interval was 77-80, the up class boundary was 80.5. In
addition, the lowest absolute frequency was 2 on the class interval 61-64 with relative frequency 6.66 and the higest absolute frequency was 7 with relative
frequency 23.33 on the both class interval 57-60 and 77-80. The whole description of statistical calculation can be seen on the appendix.
1 2
3 4
5 6
7
57-60 61-64
65-68 69-72
73-76 77-80
Class Interval
Absolute Frequency
30 100
b. Post-test score of the controlled class
Table 4.7 The Frequency Distribution of the post-test of Controlled Class
No. Interval
Low Class Boundary
Up Class Boundary
Frequency Absolute Relative
1. 60-63
59.5 63.5
4 13.33
2. 64-67
63.5 67.5
2 6.66
3 68-71
67.5 71.5
3 10
4. 72-75
71.5 75.5
9 30
5. 76-79
75.5 79.5
3 10
6. 80-83
79.5 83.5
9 30
30 100
Figure 4.4 Diagram of frequency distribution of the post-test score of the controlled class
Table 4.7 shows that the numbers of the class interval were 6 and the length of the interval was 4. While the lowest class interval was 60-63, the
1 2
3 4
5 6
7 8
9
60-63 64-67
68-71 72-75
76-79 80-83
Class Interval
Absolute Frequency
